I had sex with my husband on the weekend of Jan 14 leading all the way up to the 25 of Jan. On the 22 and 24 he came in me. I began to feel diffrent the following week. I took a hpt but negative. I began to feel pain in my stomach so over the weekend I went to the doctor and she began pressing on my stomach and there was discomfort. She submitted for a blood preg test. Today I called and it was negative. I'm not due to start my period until the 6th of feb. Is it a possiblity I could still be pregnant?