I screwed up my milk supply 😭😭😭

I am 4 weeks PP and had to go to work for 2 days. It was my first time leaving my baby. I fed her at 6am before I left for work. By 2pm my breasts were uncomfortably engorged. I went home and pumped out 8oz in total. I came home at 10pm that night and breastfed normally (every 3 hours). Last 2 days baby has not been getting enough milk, because she keeps wanting to nurse non stop and she isn’t swallowing milk, just sucking. My breasts are deflated. I used to be able to feed her on 1 boob and still have some to pump out. Now I cant get her full off 2 breasts. HELP 😭