Hi Liz!! I just wanted to stop in and give you some hope and maybe my story will help, even just a little! I am currently 38 and pregnant with my second child post-35. And this is actually my third pregnancy post-35 (first ended in a m/c).
My DH and I had been TTC since I was 34. When I was 36 years old, I became pregnant out of the blue, right before we were about to start getting serious with fertility assistance etc. That pregnancy sadly ended in a m/c at 8 wks (bubba never developed a heartbeat).
After that loss, I was told to wait 3 months and try again. At that point I decided to be ultra serious with my TTC. I did not want to go 2 more years again without getting another BFP. So I started to temp with fertility friend, and that taught me a LOT about my cycles, my O date, etc. For example, my O date was not day 14/15 like most ladies, it was actually day 23, because I have 35 day cycles.
I also used OPKs. These were sooo helpful!!! I bought a set of cheap ones, and then a box of the expensive clearblue digi ones (the ones with the smiley face). When the cheap ones started to show like they were positive, I would use an expensive digital one to confirm (that way I didnt waste them!). I felt this was the best way to predict my O. (and since you say your cycles tend to vary in length, this may work for you)
And of course, we did lots of
, every day for the 3 days prior to my O, the day of, and the day after. Some theories say that this is overkill or too much, etc. But I got pregnant within 3 months of TTC after my loss, so it worked for me!
Two other things I did, was I drank a glass of pink grapefruit juice every morning starting at CD10 through 4DPO to help with my CM production (maybe this will help you, it seemed to help my CM production a LOT!) and I cut out caffeine a couple days after my O because I had read somewhere that it can have an effect on implantation (who knows? but I was willing to try anything at that point!)
Like I said, 3 months trying after my loss, doing the above things, worked! I had my beautiful little DD at 37 years of age!!
And now I find myself pregnant again at 38, by sheer surprise! We were not planning on TTC until after the new year, but just after my DD's 1st birthday, we got a little surprise BFP! We are very excited!!
I hope this information helps you or any other ladies here who may fnd the information useful. I think learning about my body was so key post-35 to getting success!!!
Best wishes to you hun!!
.Any thoughts would be so greatly appreciated.Thanks 
