need opinions

My last period was January 6th I was suppose to get my period February 6. As of today still nothing no cramping going on.  I've taken 3 pregnancy test and still all negative. I'm so confused.  I don't think I'm pregnant but my SO thinks I am.  He actually says he knows I am.  I'm in this mindset that's is impossible for me to be.  Even though we both want it but the negatives say so.  I know I should go get checked out but I don't want to go and get devastated by the ones that know best. What do you ladies think.