Depression? Anxiety? Malnutrition

So I'm a month PP and I feel like pure shit. After I had my baby I am constantly tired and can't sleep, or feel terrible about myaelf. I feel fat and ugly basically worthless to my boyfriend. I never feel good enough. On top of that I have serious anxiety I do believe. I panic about everything and it makes my throat tense up and I feel like I'm choking for awhile until it fades. I feel like I'm dying constantly and like my memory is all foggy. I have been malnourished all my life. I don't eat meat or veggies and I barely eat fruit. I drink lots of pop and eat all bad fast food. Do you guys think having a lack of vitamins and stuff is causing my anxiety and depression? Anyone else ever experience this