Hi-
Well it sounds like you have a bunch of stuff going on right now. First thing is, you can not get an accurate pregnancy test until you have missed a period…at least 5 days late. Sounds like you have some of the symptoms, but many pregnancy symptoms are also the symptoms for PMS.
If you have had a period, which it sounds like you did, then you should not be pregnant, but you could take a test to be sure. Many times having sex increases your hormones begin released into your body and this mimic pregnancy symptoms. If you want to be sure, you can go to this website http://www.optionline.org and enter your city name. A list of centers will come up where you can get a FREE and CONFIDENTIAL pregnancy test done.
Then you can be more assured and feel a little more at ease.
I hope this helped a bit! Let me know if you need anything else!
Luv- Molly