Dov- Definitely listen to your doctor about the spotting. It just happens sometimes. My first IVF cycle I had spotting at transfer and still got pregnant. I am sure it is the same for IUI. I'm keeping my FX'd that this is your cycle! It sounds like you had a perfect follicles and a nice thick uterine lining.
bizzibii- I had spotting with my m/c cycle as well, so I can totally understand that it is freaking you out!
Will your clinic do anything to diagnose why it's happening? Could it be your progesterone is low? Some women have to take multiple forms of it to get enough.
Just whatever you do, don't decrease any of your meds. I had to leave Prague because I was out of passport days here, so I went to the UK for a while before heading back to the US. My bleeding had continued, so I went to see an RE there and they said the reason I was bleeding was my progesterone dose was too high and to start weaning off of it immediately. They said they couldn't do a blood test for it because I was using suppositories, but they just knew. (I was 8w?d at the time.) I started weaning off and then miscarried! I actually blame the change in meds for my m/c, not the bleeding! I think my progesterone was already too low and that RE told me the opposite of what I needed to do.
AFM- I know it will be a back to back cycle, but I am so happy with my RE's decision to have us do another cycle now. I don't know why, but I am feeling so healthy! The healthiest I have felt in years! And DH seems like he's feeling so much better as well. Plus, spring is my favorite time of year, and the weather is just beautiful here in Prague. I just have this feeling that an IVF cycle now is a really really good idea. And I feel like my body is really ready for it for the first time! I've never felt this good about starting a new cycle- not even with my first IVF. Plus, we have found the next apartment we'll be staying in. It is in the perfect neighborhood, and only a 12 minute bus ride to the clinic! (Our current apartment is a 40 minute ride.) I don't know- I'm just feeling so, so, so good right now. I want to take advantage of that feeling!
I did do a lot of research to make sure that back to back cycles are okay, and everything I can get my hands on says that they are totally fine as long as everything has healed up. (RE has made sure I have.) There are several studies that even say that women who don't ovulate on their own often do better with back to back cycles, because it allows the body to follow a natural rhythm and this is healthier that going back into another annovulatory cycle which can cause damage to the ovaries.
I really wonder if my back to back FET/IVF is why I'm feeling so healthy??? If so, I imagine I'm going to feel absolutely amazing after another cycle!! And with as much weight as I've lost, maybe I'll even start ovulating again on my own soon. A girl can dream, yeah?
im so very sorry to read your signature hun 
