Feeling lopsided!!

Does anyone else’s baby only want to nurse off one side? My right has always produced more but now she gets super angry when I try and start her on the left. It started at night when she had only been nursing off one side. My right was always super engorged so I only offered that and pumped the left. Now my left hardly produces anything. I’ve been pumping the left every time I nurse her on the right and even try to get her to latch but nothing is increasing my supply. Any tips?? We’re going on a beach vacation soon and I really don’t want to feel lopsided in a swimsuit. 😫