Different weights in twins, love to hear you personal experiences

I went to the doctor for a sono today. Baby A weighs 7 oz/17w1d and Baby B is 6 oz/16w4d in stomach measurement and 16w5d in head measurement at 16w6d. Two weeks ago (I don't remember their weights) at 14w6d, they were measuring at 15w6d and 15w5d. They were basically the same size. They still can't distinguish if I have one placenta or two fused together. They did both have three vein umbilical cords. They are in separate amniotic sacs.

So I'm basically trying to not worry. My doctor was not concerned. He said of course they will keep an eye on it and they will see me again in 2 weeks. Their bladders were very distinguishable so they should be getting enough fluid. I don't remember her measuring amniotic fluid, but I'm sure she did and just didn't point it out.

All this to say, twin mommies, let me hear your stories. :) Did your babies have big differences in between sonos? Or just encouragement of any kind is good too? I'm trying to stay away from google and reading worrisome stories.