Don't know what's going.

I'm about two weeks late on my period, I took 2 pregnancy test and they both came back negative. I've been having sore breast and been having watery discharge that has no smell. I'm not sure what's going. Me and my fiancé have been trying to conceive for the past 2years and haven't been able to get pregnant. I thought I had something but I went to my clinic to get my yearly check up and everything came back negative so I'm not sure what's going on. Can someone help. Btw my fiancé is very excited because he's hoping that I am pregnant and it breaks my heart because these two years I haven't been able to.