I recently had sex, it was protected but the condom broke. I bled a few days later like a light pink, it lasted about a day. It was light enough that I needed a panty liner. Then a few weeks later I was expected to start my period. (I usually start every 18th.) , and I started a whole week early(The 11th). It wasn't like a normal period either. It was light bleeding not enough to fill a pad. And it was light pinkish and brown spotting lasted about 4 to 5 days and had cramping and now I've been having a strange sensation in my lower stomach area and extremely tired, with headaches off and on everyday. Later in nights I get a nauseous feeling.. What's happening? Should I be worried?