Help! 19 days of highs on clearblue

Has anyone else had 19 days of high with clearblue advanced on clomid? Even with diluted urine! I took a cheapie hcg rest with diluted urine tonight which was negative.

My boobs started killing me 2 days ago along with some cramping but no spotting. I usually always have spotting my before my period now which is due today but is so far a no show. CD 29 today and on CD 12 I have a follicular scan with 4 follicles around 20mm with the largest being 23mm but an endometrial thickness of 3.6mm which is definitely bad.

When I was on clomid a few months ago I got a peak around CD 19 but I have yet to see that this month.

Any similar experiences??