Hi I had my gastric bypass surgery on 12/18/2021 and I lost 31lbs. Now my issue is getting use to the measurements because I feel nauseous, if I eat like a little more. What should I do, any recommendations please.

I would start with smaller portions so if you're eating 4 oz cut down to 2-3oz to see how your stomach reacts

Each plan is different, but you're saying you had surgery 3 days ago? If so, you should likely be on liquids/purees, correct? My suggestion would be to follow your plan exactly as outlined. It will likely include VERY small portions multiple times a day. No need to try and eat more than what your body will tolerate. Eat/drink very slowly and stop as soon as you feel full (hiccups, sneezes, runny nose, burps can all be "full" indicators post-op).

if you feel nauseated, then I'd stop even if you haven't eaten the whole measured-out amount. Some people's systems just aren't ready to progress as quickly as others. Some people have to back up for a few days and then try again. And the above person is correct - a lot of us are on liquids or purees for the first two or three weeks ANYWAY. I'd contact your clinic and just let them know what's going on and see what they suggest.