It's also important that you keep her on the slowest flow teat (i.e."newborn", even though she isn't) so she doesn't get to expecting an "easy" feed. You are about at the stage when supply is supposed to drop to meet demand, but until you have her feeding strongly again pumping is a sensible idea.

Have you changed perfumes or washing powder or anything else that might make your chest smell different?

Another is to give her a little EBM bottle with the gaviscon and then a bf.