The pharmacy will probably say to do what the doctor says. For short term use adult gaviscon is fine for your child especially in that dose. That being said, 1/2 a ml generally doesn't do much, so if it does great, if not you may want to get a script for a better reflux medication.

With the feeding, that is a hard one, what they reflux on is the milk, so once that is in their tummy they will reflux on it, if you continually are topping her up, she will continually be getting reflux. She also won't get a full feed since she will be wanting to do this more regularly.

It sort of goes against everything we are taught about B/F but go with your gut if you think it isn't interfering with her feeds and not making her any worse then try it.

Have you tried propping the bed?

There are lots of great tips on a site, if you google infantrefluxdisease, it should be the first one.