5 months and lazy latch, the pain curls my toes :( advice?

clizh

DD is almost 5 months old, we've been BFing since birth but only EBFing (not even bottles) for the past 3. Lately her latches have been really lazy and it's toe curling pain, she completely flattens my nipple. I've broken the latch and tried for a better one but it rarely helps and when it does it's only for a minute or two before she slides back down. Sometimes it's tolerable so I just let her go, especially at night so she'll go back to sleep. Other times, like now, I'm in tears it's so painful. Between this and her hitting/pinching/punching/kicking I want to stop BFing, but when I think about stopping I tear up because that isn't what I really want... it's just hurts so bad. This "stage" has happened before and we waited it out without looking for any help but I don't know if I can do that again. Does anyone have any advice?