Poor thing, it hurts so much huh. Expressing hurt me more. After a feed I'd sit outside flashing the backyard with boobs out. Sunshine and fresh air helped lots. After about 5 mins I'd cover them in bepantham ointment. I had 2 disposable nappies with water in them in the freezer. An hour before a feed I'd put them on my bra to numb them for about 10 mins (they dont drip) then massage the hell out of them whilst they were numb. As they warmed up it seemed to stimulate milk so when it was time to feed not much sucking was required and after a few days the bleeding stopped.
Hope you heal quickly