first you want to deal with the ulcer before you start anything else. you can't really do anything with your health if you are in pain or your stomach is damaged.
if you are blood type o then you should look into the Blood Type Diet
as there are a few herbs and foods that are specifically recommended to heal ulcers. moreover many of the avoid foods for type o can cause h pylori to proliferate, so just avoiding those can take care of the problem. but... we don't know what your blood type is.
conversely if you are blood type a, who are prone to low stomach acid, then you don't want to be eating a lot of protein anyway.
diet is paramount in healing ulcers and probably also in causation so post what your diet has been like.
there are traditional remedies for ulcer such as raw potato juice, raw cabbage juice, cayenne, manuka honey, and mastic gum. but before you address diet those things may not work.
also some natural health people think that the cause of ulcers is not having enough stomach acid which causes the stomach ph to be too alkaline which in turn allows h pylori to flourish.
you can try hydrolyzed proteins for the time being or cook your proteins for a very long time under low heat so that they are completely broken down. this differs with dr. wilson's program but i still think it is a good idea for some people.