I messed around no sex 6/9. period came 6/24 like normal. next one's late, but was lots with clotting 7/24. this month no show 8-20. prep or stress?

Unlikely preg. but..: It can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A urine pregnancy test gives a reliable result if done correctly. One can test about 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period. An Ob-Gyn doctor can evaluate any persistent or worrisome symptoms.