Pumping is starting to hurt

I’m 6 weeks postpartum and have been exclusively pumping since day 3. I was totally okay until last week I noticed my nipples are very very sensitive now. Slightly uncomfortable to pump now but not too bad (I was using too small of a flange at first and switched to a bigger size but not helping) and I cant even face the water when im showering because even the water hitting my nipples hurts!!

Has this happened to anyone else??? Will it get better? Wondering if its my nipples constantly being in moisture (breast pads) is whats causing the problem or if its the actual pumping.