I would definitely talk to your provider.
Are you having heartburn or issues with solid foods?
They recommend hot drinks in a morning to loosen up the band. It sounds like you may have too much restriction, if so you need to sort it soon to avoid any complications down the line.
I have regurgitated liquids before but I am being investigated to see if my band has slipped. It didn't happen to me when things were going more smoothly, so definitely not something I would accept as just one of those things (which I have done far too often, probably leading to my problems!)