Post Partum Depression?

I gave birth to a beautiful baby boy 12/03/18. He’s two months old now and I still don’t feel like myself no matter what I do. His father unfortunately went to prison a week before I had him😔so I’m basically a single mother right now. When he calls and I tell him how I feel he just doesn’t get it. Nobody really does tbh. Theres times I just sit and cry out of nowhere. I love my baby and I really love being a mom I just feel like I never have a moment where I just can stop and deal with my emotions and what I’m going through internally (if that makes sense??) I’m always on the go whether it be with the baby or at school (I’m a full time student) and I have to always keep a smile on my face ya know? It seems like I’m just tryna get through another day and I never have a resting period where I can just stop and BREATHE😩😩 his dad thinks I’m being over dramatic but I can definitely tell my mental health is completely off. Any suggestions or tips on how I can deal with or make this easier? Please❤️I feel so stuck