Any help?

Me and my husband have unprotected sex mostly and I have been nauseous but haven't thrown up just to the verge of it, and my boobs are so sensitive I can barely touch them or can't even jog because of how sensitive they are and I haven't had my period since June? I'm 3 weeks late for the one that was suppose to go into this month. My pants hurt my stomach if I wear them for anymore than 4 hours. Sound like anything, I want my husband to be surprised if we are expecting but we are always together when we go out so can't get a pregnancy test when he's there and we are off the same days when we work so it wouldn't work then either. Any suggestions?