My periods were on last 22 dec 2010, we had unprotected sex from 1st to 8th. From 3 days my breasts are paining, I had spotting today very little and my am suffering from cold. I feeling bulgy very little. Am I pregnant

Could be , but it may be other things, so until you take a Pregnancy test, you will not be sure. It may be slightly too early for a test yet but soon.