Could i be Pregnant, or maybe its side effects?

I have been off my birth control for 2 months now. My Last period started on June 29, and Im on a 28 day cycle, so my period is due next week. End of last week and all this week my have been so sore, but today they are not very sore just sensitive, I have been way tired, congested with a stuffy nose, and always feeling hot. Headaches have been bad. I also keep getting a little bit of heartburn and when i burp its like acidy stuff comes up ( sorry if TMI). I just feel like i might be pregnant, Idk does this sound like early symptoms?