Disappointed

I really want to give up on trying to be pregnant... I don't know... its been a few months now and I started to get stretch marks all of a sudden on my breast, I had a really weird type of period if you can even call it that, and I started getting bloated... I was looking up signs and such so I thought id go buy a test and the first one didnt even say anything and the second one was negative.. I get on here and everyone just seems really happy they are pregnant..just wish some good luck would come my way.