Self harm

I am 2 weeks pp. Ive dealt with the ppsd since i was pregnant but now it just seems so much worse. I cry atleast 3 times a day. I have a 2 year old and a 2 week old. I love my babies so much!! Dont get me wrong, but i just feel like i want to give up. I literally think about throughout the day me getting really sick or injured to where i have to stay in the hospital just to get away from everyone and everything going on at home. I haven't told my Dr about these problems, my appointment with her isnt for another 3 weeks. I really dont know what to do. I just want to smoke weed again.