Are you taking the 2-week triple therapy including antibiotics..

Make sure that you do a breath test after your treament is over to check if you are truely HP free or not.  Once you get rid of HP bacteria, your stomach needs time to repair. It might take quite a while. People are different. Some people get well quickly. Some people may have chronic gastritis hanging on, but eventually you will get better and well. Try to eat mild and bland food which are easy on your  stomach for a period of time. Hope you get well and you will, I am sure. Take care.