I Have A Lot Of The Side Effects For Advil.

I have a lot of the side effects for Advil. It's kept me awake the last two nights with the stomach pain and nausea. Thank goodness the vomiting stopped after hours yesterday. Mostly clear, mucus, no food in system. I have discontinued my Advil completely now. Still having stomach pain and a little nausea. The nurse in my doctor's ofc suggested Zantac, which I have taken and seemed to help, and a bland diet. I forgot to ask....What can I take for my pain? I have degenerative arthritis in both knees and both hips, sciatica and headaches periodically.