Worried.

So I had my normal period on September 15-19 and the night after it was over I had sex and the condom broke. The next morning we went and got a "Take Action" which is the more expensive, one pill version of Plan B. It made me kind of sick and I had a little spotting over that and the next day. Everything was pretty normal following this. I have not had a period since then but have taken 5 pregnancy test which all have said negative. I am not having any morning sickness or sore breasts or cravings, so I don't think I am pregnant. Does anyone have any suggestions or knowledge of what could be up?