I am on birth controle pills and have been for 12 years. I have a special vacation in a few weeks so i postponed my period for one week so it would not interfere. I started my period this past monday and stopped bleeding yesterday, friday. I had sex with my partner this morning and afterwards went to the bathroom and a dark clot looking thing about 1 cm came out and then i started bleeding bright red. Im not bleeding alot but when i use the bathroom bright red stringy blood with some small clots come out. I have no cramps but my breasts were very tender before i had my period. I had a miscarriage 2 1/2 years ago and this seems similar but i dont think i was pregnant. Is there a possibility i had another or just my period?