pumping and boobies...

My LO is 4 days old and my milk just came in(yay!) ..my LO wouldn't latch properly and was starving herself so I decided to pump. I've been pumping since day 2 of birth. Now that my milk is in, my boobs grew about 3 cup sizes 😣 I pump every 2-3 hours for 15minutes. Will my milk supply eventually go down to what I'm pumping? Should I pump until they stop milking? Or just keep pumping every 2-3 hours for 15 minutes. Ftm and not exactly sure what to do!!