Hi Doc I Had Unprotected Sex Soon 2 Or 3

Hi Doc

I had unprotected sex soon 2 or 3 days after my periods which was on Saturday and took the pills on Monday during the day which was in the expected hours to drink it. 2 or 3 weeks later am getting creamy white discharge and a Lil back pain even some pains which seem to be like period pains sort of I took a pregnancy during the day. Not in the morning 1 was positive and the other negative am confused could I be pregnant because there is no change in my body and i started exercising so am confused because am waiting for my periods