Postpartum

I'm sorry to hear you're going through it right now.
First off, our SOs can be so oblivious to our struggles, especially if we internalize it. So sit them down and have a very frank conversation about what's going on. Communication is a great foundation for a great relationship. Ask what you need from them; no hinting, don't be vague, just ask.
If you can, find a therapist that specializes in PPD/PPA because not every therapist does, and it's important to have the right care.
If you cannot/while you get a referral to a therapist, you can do activities and hobbies that bring mindfulness into your life. It can be as simple as breathing or grounding exercises, going out to take a walk (yes, going out can actually help your outlook on life because of the fresh air and the endorphins), or as crazy as doing arts/crafts (not everybody finds this relaxing, it was just an example).

If you need to talk to someone, I can be an ear, just send me a message. Many hugs.