Haribo, I've gotten back to you too late. I don't think it makes a different if you BD the day before you get probed by the ultrasound. You might have found it uncomfortable, but probably saw it's pretty easy.
As for me, it's been another whirlwind of fertility visits. Saturday's appointment showed that I had 8 follicles developing, if all were to be released it could mean IVF. So they cut my medication in half and today's appointment showed only 5 follicles. So I think I will have ovulation induced tomorrow with a trigger shot, and then we will do the IUIs this Wednesday and Thursday. Of course, this is WAY earlier than I expected to do it. We are talking CD10 and 11 here. So I'm pretty overwhelmed by another unexpected turn of events, but I'll go with it. I hope that five follicles means I have a better chance at getting a BFP!
This is absolutely the worst week for both OH and I to be doing this. Both of us are insanely busy at work and I'm not sure I will even be able to make my acupunture appointment after work on Thursday, but I'm not going to stress about it until I cross that bridge. I look at it this way: For my first two IUIs I went home and did nothing for 2 days. This time I will have to go back to work and face two, very busy days in a row... So maybe that is a good thing. If I went home and did nothing before and had 2 failed IUIs maybe I need to go to work and be intensely busy? I'm trying to see the positives!
Some of you may recall, that OH put me in touch with the wife of a work colleague who has studied nutrition. She went through two years of TTC with 3 MCs and 3 failed IUIs. She did a major overhaul of her diet and got a BFP after six weeks of changing her nutrition. I will copy and paste what she wrote... Keep in mind that lots of people get BFPs on all sorts of diets, but this is just one example that worked for this particular person if anyone is interested:
"The diet consists of eliminating: all sources of gluten (includes wheat, oats, rye, barley etc) all dairy except organic natural yogurt (no sugar added) all meat (only organic poultry and fish allowed) all caffeine and alcohol, processed foods (especially those with added sugar) added sugar, saturated fats and soy (except fermented soy eg soy sauce, miso, tempeh)
Things you should eat: fish, poultry, eggs, beans, grains like quinoa, millet and brown rice, lentils, chick peas, fruits and veggies, organic yogurt, nuts and seeds, almond milk.
For exercise: you should exercise but for no more than 45 minutes 3-4 times per week and not too intensely.
A few sources:
The Infertility Cure by Randine Lewis
The Toronto Centre for Naturopathic Medicine (handouts from my naturopath)
The Pregnancy Miracle by Lisa Olsen
There are some differences between the sources in terms of which fruits and veggies are best, but I just eat any fruits and veggies. The idea behind eliminating gluten and dairy is that in many women they cause inflammation which prevents conception. Red meat causes an acidic environment which prevents conception. Caffeine is known to have detrimental effects on pregnancy, and alcohol has been found to decrease the likelihood of conception. Saturated fats, unfermented soy and added sugars increase estrogen production.
I would also strongly recommend that you see a naturopath, who will give you acupuncture to promote correct uterine function, may recommend some supplements/herbs and advise you further on nutrition and lifestyle changes.
While I have little doubt that the diet and acupuncture worked for me (fingers crossed!), I know it doesn't work for everyone. I truly hope that it works for you.
@Lauren: On the topic of decaf, this one is for you!
"I personally avoid decaf coffee. The processed used to decaffeinate coffee involves some fairly nasty chemicals. I stick to caffeine-free tea. I have found my energy levels have naturally picked up since being on the diet (I am still on it, at least until the end of my first trimester.)"
Well, I'm up at the crack of down tomorrow to go back to the fertility clinic. I honestly could not believe how busy it was today. I got to the clinic 30 minutes after it opened at 7 a.m. and I was the 31st person in line. I didn't get out of there until after 9 a.m., so I guess I'm not the only one in this city struggling to get my BFP.
I'm trying to remain optimist, although I do have my "what if" moments. But I figure with 5 follicles and doing injections that are giving me a thicker lining, this is my best chance yet!
glad you are still keeping on trying though and just gotta keep your chin up!! 
that they really had to race for their lives 
And just goes to show timing is everything. And ~1/5 chance in success every cycle. 
