Tired of getting shamed for giving formula

Ive been struggling to get my new born to latch on. She pulls and bits my nipple which makes them extremly sore and it makes me not wanna breast feed anymore. Thats what my babies pediatrician doesnt understand. Shes pressuring me to breast feed for a whole month with no formula but she doesnt get that it hurts. So what i am going to donis pump as much as i can to build my supply and what ever comes out i will feel to my baby and formula feed at night. What are some tips on how to build my supply. I plan on pumping five times a day, but other than that what can i do?