Consult with your doctor
You can consult to a doctor or physician who can give you correct suggestion by which also you can have lot of help. But internet is also there for your help because from there you can get that much information about which you have not thought even and this is because there are number of sites. As it is mentioned earlier there are many more food which contain protein but the food which are mentioned above are not only the food stuff which contain food there are many more.
The next question which can arise is that how much protein should be there in a high protein diet and the answer for this is that in any condition .5 grams to 2 grams of protein similar to body weight is fine but you should always try to stick to 1 gram per pound. So if you are thinking of loosing your weight then also you can have at least one gram per pound a day.