Three months late, neg. home test & blood test

I am very worried. i have not had my period in 70 days. I went to my Gyn, he gave me hormone pills to regulate, but it has not helped. my belly feels and looks bigger! I can not suck in my belly anymore. It feels hard. I've been so tired and i think i am pregnant. I've been haven other symptoms as well... but i have took home test and i had one said yes, but all the others said no. and the blood test said no. I am getting a pap smear Monday... I'm going to ask him the questions i've been having. i will probably get the same answer as last time. a phantom pregnancy.. I just want to know what is going on.. any advice would be great.. thanks