smaller meals for LO...how?

6sour6grapes6

she has silent reflux, and has been on meds, but I don't think they are working well enough. I have always fed her from one breast at a time, and lately it's only taken 5-10 minutes for her to get full, and she eats every 2.5-3 hours during the day and 4-5 hours at night. I want to start giving her smaller meals, but I'm worried about her not getting enough hindmilk if I do this. Do I block feed, and pump the other one, so my supply doesn't tank? I really can't imagine going for, say, 3-7 minutes at a time, but willing to try it. An tips on how often to feed, and for how long, and when to pump and for how long? TIA