am I pregnant?

I have regular 28 day cycles and have depression. Currently coming out from an episode. Last year I went through one and was the first time I skipped a month of my period. Had zero pregnancy symptoms. This month, I've been nauseous for two weeks and have pressure in my lower belly. Super bloated, gassy/burpy. Very hungry despite the nausea!??? So much saliva. I'll randomly get these middle headaches.  I feel so weird it's like I flipped a switch after my episode I would wake up super happy but still feel weird. Ugh I need opinions good or bad! Help!! Also I'm 3 days late.