I had unprotected sex on March 1st but there was no ejaculation. I had bleeding on March 12th (my periods should have been between Feb end to March starting). It was with clots but the quantity of blood was lower. It lasted for 3-4 days. Again I started to bleed on March 29th but it was brown and bright red with clots. But the duration and the quantity of blood was lower. Is there a chance for pregnancy or am I having irregularities in hormonal balance?