I had absent period since the last 5 months, after which my gynaecologist prescribed me nostra cr 15. On the 4th day after stopping the medicine I got my bleeding. Initial 3 days it was with cramps. The bleeding lasted for 6 days. The flow was medium to heavy. I was sexually active 5 months back om 18th March. It was a protected sex, and I didn't had my periods in March as well. My period date was supposed to be in the second week of March. I took 2 urine pregnancy tests, 1 in May, 1 in June, but both of them came negative. Is the bleeding because of nostra my periods? Does it indicate that I'm not pregnant?