Just wanted to reiterate that you are doing a great job.
Sounds like bub is healthy and getting huge feeds too which might explain why he doesn't need as many... Breathe... Look after yourself too. From my experience of working full time, feeding. Surgery which smashed my supply at 5 months, bringing a feed forward in the evening will be hard for you! I used to feed the first thing as I walked through the door, then bath my two gorgeous babies, bed time routine and then I'd realize I really needed a glass of water and had been busting for the loo for the last couple of hours.
I think you should do whatever works for you bur quite honestly it doesn't sound like you need to DO anything except give yourself a pat on the back. You are inspirational. Down the track you'd be a great to help to others who have surgery etc. Hugs and congratulations for being an awesome mum!