Me and my husband been trying for a baby we had intercourse the 28 through the 31 and I am do for my period the 13 and I have been having signs such as sick to my stomach for a week now and the dark spot around my nipple got bigger I been really tired and when I try to suck in my stomach it hurts really bad but I took a test yesterday the5 and it was negative but I think it was to early to tell are these signs of pregnancy?