Positive then negative?

I have PCOS and I take Clomid on cd 5-9. This month was very different from the start. Using clearblue advanced digital, it was negative opk then went straight to peak. It stayed high for 3 or 4 days, possibly more as I had stopped testing. I also had spotting all the way through my fertile window. Since then I have had really sore nipples, heartburn, constipation, have been very thirsty, and most recently a stretching feeling in my pelvis. The tests are from top to bottom..

Monday fmu

Monday pm

Tuesday fmu

Wednesday am (not fmu as I went overnight)

Thursday am

Friday fmu

Friday fmu

Saturday fmu

Saturday fmu (LH test)

The first three look positive to me but none since. How could that be? I took the LH test because I've heard of people who use them as a hpt.

Any insight would be greatly appreciated!