Ok so here is a question, and you guys might thing it sounds stupid but...?

So I suffered a miscarriage on December 11th 2007. I hadn't had my period at all until February 5th. Before I had gotten pregnant I had been charting my period on the really good website that tells like what days you are ovulating and stuff...Well the website said that I should ovulate around the 20th. I had a "normal" period until about the 15th and ever since then it's been very light. (i know that seems a long time to have a period but I hadnt had one for 6 months, doctor said that's normal) Anyhow, I've been spotting all week and have slept with my boyfriend quite a few times. My question is, even thought I was bleeding a little bit would I have still ovulated around the 20th and could I still get pregnant. A pregnancy would be a good thing, so no need to say should use protection and stuff like that just to let you guys know. Any help would be appreciated. Thanks :)