My baby is 4 days old and was sent right to nicu after birth due to swallowing some fluid and had it…

My baby is 4 days old and was sent right to nicu after birth due to swallowing some fluid and had it in his lungs. He was also 4 weeks early, born at 36 week gestation.

This is my 3rd child but my first time pumping and breastfeeding. He still has his tube in for feedings so I've been pumping for him.

Last night after pumping I noticed a clear like blister came up as soon as I took the pump off beside my nipple and was as big as my nipple. It popped shortly after and I just have a bit of torn skin there. I'm not sure if the pump funnel is too small but I think it could be bc when I'm done it leaves a huge imprint around my nipple and aerola. So hubby is gone to find a bigger one.

Has anyone else had a blister come up after pumping??