Nipple pain

Im exclusively pumping milk only. 1 mth in, & i’ll get random nipple pain— gastric pain feel but on the nipple? Ive got mastitis too but the pain keeps coming back. Its so painful that I cant even carry my baby properly ☹️ & when I pump, not much milk flows out… i ended up taking painkiller all the time but till when? Anyone facing the same issue?