anyone else?

Okay, so please keep an open mind. My boyfriend and I have been ttc, my period was a day late. But I've been having some pregnancy symptoms ( sensitive breasts, hot flashes, constant headaches, &insomnia;). Now, AF came 3 days ago and I'm still having the same symptoms! * I know your breasts get sore during AF * but I also know my body! My boobs never get sore or sensitive like they are!! So, now the other part. My periods are ALWAYS heavy, but this cycle is pretty light. Like so light that I've only been using 1 pad a day, and half the time the pad isn't even full. It's definitely my period, BUT why if AF suddenly so light?? I've had my period since I was 9 years old and I'm now 21!!** In those many years, I've never once had a light period like this!! My doctor told me to wait about a week and take a pregnancy test just to be sure. .. I'm curious as to if anyone else has had this problem and was actually pregnant?? I'm really not sure what else it could be from!? Please comment!