LO isn’t swallowing on one breast

I’m becoming really concerned that my right breast isn’t producing much anymore. It was my bigger producer in the beginning. And it still leaks ALL THE TIME. But when it comes time to feed, LO only swallows every 3 or 4 sucks... I’ve been trying to put her on that breast first more often recently to try to stimulate more production, but it doesn’t seem to be getting better. My nipple just hurts so bad I want to cry from being used so much. She’ll feed for 10 minutes on the right (not swallowing often), and then I’ll switch her to the left side and she gulps down like she’s starved. She’s getting enough milk in general because she’s gaining weight very well and has plenty of wet diapers. I’m just really worried about my supply and getting so stressed out about it.

She’s also been cluster feeding the last few days, and I’m wondering if it’s because she’s not getting what she should be from the one breast so she needs to feed more often?