baby fever

My boyfriend and I have been together for 4 years, talking about marriage in the 2018 and to shake things up a bit I am a week late on my period. I've been feeling so strange lately and cramping and emeptional and even some random throwing up so this morning I bought two pregnancy test and both came out negative. I know normally you're supposed to be happy about this but I read the test and just went to lay in bed super sad. I want a baby so badly and I know he does too we just haven't gotten married yet so he doesn't want to go all out and make a baby, but honestly this time I really thought I was pregnant and I was so excited to read the test because I was almost sure of it and of course it's negative. I don't want to feel sad but I can't help but see all the pregnant ladies everywhere I go and not feel jealous... what's wrong with me?