Hey Kate, I can relate on the HB. I was taking Rennie, but they stopped having an impact, so I started on Zantac. Was the best thing I ever did (well almost!). You can get a small pack from the supermarket or larger packs from the chemist. You take it whenever you feel the symptoms starting, or if you know you are going to get it regardless of what you eat (a glass of water could bring it on at my worst) take one before you go to bed. NOthing to chew or suck. It actually prevents the symptoms, rather than taking something after the symptoms have started.
Good luck with them!