Hi doctor, I had sex February 14th 2017, and came on my cycle February 19, 2017. I missed my cycle for march and I wounded up pregnant. when I went to the hospital ( April 1st, 2017 ) they said I was 4 or 5 weeks pregnant couldn't give me a specific answer. Now the problem is, Could that be with the person I had sex with February 14, 2017? I also had sex March 10,th and March 11th 2017. I just need to know the exact date I conceived . I just want to know was it possible for the February 14th incident to whole on for a week or two and I end up pregnant from that after my cycle? or did I get pregnant from my March 10th & 11th Incident?