Hiya....i'm too am sorry about your loss... i actually THINK i suffered from a chemical last month as i had such horrendous pains, headaches and felt sick that woke me up at 2.45am in the morning...never ever before has that happened...
My cycles are anything between 26 and 30 at the moment from what i've learnt. I came off the pill in November 2011 and didn't actively start TTC til February so i think i'm still settling down in this department as my ovulation shifts from CD12 to CD18 at the moment.. From what i've worked out i think i have a 12 day LP,..they say the LP doesn't change (unless there's a deficiency there),...so you can work back from when your period starts to try and pinpoint when you actually did ovulate,...if that makes sense!
I second a visit to your Docs
. I did take myself off to the docs to get my hormone levels checked out in April. I had 21 day bloods done to check my progesterone levels. They came back normal so at least i know i'm ovulating. Whether my eggs are of a decent quality or not...who knows,...just waiting for a decent one i guess and timed BD'ing to catch the bugger!!
Have you thought about temping??