Strange brownish spotting for 8 days. Took an aspirin and it got heavier. Could I be pregnant? Please Help!?

First of all, do yourself a favor and just take a pregnancy test. It's the only way to know for sure, and you'll feel better once you know what's going on. Just because your boyfriend didn't ejaculate inside you doesn't mean you couldn't have gotten pregnant. You can get pregnant from pre-ejaculate. The reason you started to bleed more after taking aspirin is because aspirin thins the blood.