I feel like I’m going to die. PPD is bad

I am going through post partum depression really bad and I’m not sleeping at night. With anxiety or up with my 3 month old. Now my 2 year old has fucking stopped sleeping. She will go to bed at 1am and sleep til 8am. I put her to sleep last night at 9:30 with melatonin and she’s been up since 4 this morning. IM NOT SLEEPING. I’m sick. I can’t stop crying. I can’t clean the house cause they are always running me around. My 2 year old DOES NOT listen. She also IS NOT EATING. Their dad doesn’t get home til 8 at night and leaves early in the morning. I literally feel like I’m losing my mind