I was about 2-3 weeks pregnant and my boyfriend and I had sex and I started to lightly bleed pink blood so I put a tampon in. Later that night I took a pregnancy test and the pregnancy line was very faint. The next morning I wasn't bleeding but later that day I started to bleed heavily with red blood. I have some cramps. I am worried I am having a chemical miscarriage. We really want a baby and are getting discouraged. I really need to know if this sounds like a miscarriage. I would also like to know how to avoid a miscarriage and how to increase the chance of pregnancy.

