spotting or something else?!

hi there, I noticed today after I'd wiped there was a little bit of blood on the paper it was the tiniest bit and a bit streaky? it wasn't a lot , I came off my period about a week ago now and I've never had this before, my partner and I have always had unprotected sex we have been together for 8 and a half years. We have been trying to get pregnant for 8 and a half years nearly now.. is this wishful thinking could it be spotting??? I haven't had anymore blood since and it only happened today?? throughout the day I have been feeling very nauseous and have had a little diarrhea ( sorry if tmi) any advice would be highly appreciated. I just don't wanna get my hopes up :(