Help!!!!!

I am now 27 days late. I missed a period and now I'm in the process of missing a second period. I took a test about 2 weeks ago and it was negative. For the past week I've been SO bloated my stomach sticks out and I feel I have to waddle.  I can't even suck it in. I feel very full.. Kinda the feeling after a big meal. I have to be up super early for work bc I work at a hospital and I'm very sick in the mornings. Dizzy, light headed, nauseas. Sometimes when I eat it it'll make me feel better though. I've tried too Google diagnose, and it says it could be pregnancy or PCOS. What is going on with me??!