On December 2nd I got my period like normal. On December 14th, around 11am I had sex, but he did not cum inside of me or at all, in fact he was only inside me for about a minute. There was no condom though, so I became paranoid and took the plan b pill the next day at about 3:30pm. After that on December 21st I got my period again which was 8 days early which I assume was the pill messing up my cycle. It seemed like a normal period. But now on the night of January 2nd, I was "fingered" and right after that a brownish discharge started happening and didn't stop until the next morning when it turned into severely heavy bleeding up until this morning, January 6th. Could this be implantation bleeding or just the plan b? I doubt I was even pregnant in the first place but should I take a pregnancy test?