I had my period for 7 days, on the 9th day I had sex with my husband. The morning after, I saw this blood clotting when I pee. The blood stop after a few hours. On the 11th day, we had sex again, same thing happen when I woke up in the morning.
Note that I never had sex with any one else except my husband so its impossible that I have STD. Also, I was taking clomid and premarin the past 2 cycles and metformin on the 3rd. Now, Im not taking anything, could it be because of these meds? Advise. Thanks

I have had similar situations when I have used tampons during my period and then had sexual intercourse soon after. The doctor told me that it was because the tampons make it harder for the larger clots to come out than pads do so the blood gets shoved up there and when you have sex the penetration releases the clots. Hope this helps. :)
P.S. If you continue to bleed for a long period you could be taking medicine that is thinning your blood so if this persists call your doctor.