HELP! Possible pregnancy or preperiod symptoms? I am 16 and can't talk to anyone about this at home.

Mikaela
I had protected sex on the 21st of September, and I began ovulating on the 24th of September. I wasn't sexually active durning my ovulation period (24th of September- 1st of October). It is now the 7th or October, and I am spotting and bleeding durning foreplay. I have really weird spurts of nausea, and have been extremely moody, but I also am supposed to start my period on the 14th. Could I be pregnant or is this just pre period symptoms?