Based on the timing, it sounds like you had unprotected sex about the time you ovulated so there is definitely a chance you are pregnant. You need to get a home pregnancy test and use the first morning urine with it. Hopefully you are not pregnant but, if you are, I can help you find a loving home for your baby if you are unable to keep him/her.
The only thing you can do is take an hpt.
it could be the pregnancy symptoms you are having now, take hpt with first morning urine. or it can be PMS symptoms also.