Hi stayhopeful! Its great that your lining is thickening
as for ovulation goes, I think I ovulate 4 days after my pos opk. I got my smiley last tues, and Friday I was in bed with nasty cramps and gassy feeling. So I think I ov fri. At least I hope I did, lol. I go in for day21 on wednesday so hopefully I will find out by Friday. I hear ya on the sore nipples though, I have to be wearing a bra at all times otherwise they are so sensitive. Clomid side effect maybe? I'm trying not to symptom spot. Lol.