Moms what do you do when you are feeling overwhelmed?

Just a rant post if you allow me. I am 3 months PP and was taking it like a champ until ... Return to work discussion with my boss flipped me over and PPA kicked in... Now I'm a mess, I used to be able to stand stressors pretty well but now? Any little thing that goes wrong sends me into a spiral where I just want to divorce, start new life etc. I feel like the only thing that helps me is going out with the baby for a walk when we can. I just feel like my marriage is falling apart every day because I can't seem to be strong enough to tolerate my partner anymore, let alone the thought of going back to work makes me irated and I feel so physically sick 😫 Tell me it gets better!