Hey.my Girl 8 Yrs Old Was Last Week Diognised With

hey.my girl 8 yrs old was last week diognised with hpylori..she was given claritek and amoxillin .then on top of that she got nexium 10 mg and cyclopam for a painkiller..my question is..when does the pain go away coz i can still she shes in pian occasionaly or how long will she need to be on pain killer,,another question is,,is there an alternative strong painkiller that can be administerd..then are there foods to avoid or foods to give more to sooth the tummy..
thanks woried mum