Baby fever!!!!

Me and my fiancé are having a very bad case of baby fever. We have tried all month to conceive but now that’s been a month and my period is scheduled around this time. I’m starting to get cramps and slightly tinder breast and an occasional nausea. And I have taken two pregnancy test and both were strong negative. We really want to have a baby but my fiancé thinks we are trying to hard. I need some advice.