My Inconvenient Truth!!

The Doctor's office called with the results of my lab work. The nurse told me my Enzyme levels are too low which makes it difficult for me to digest the following food groups: Sucrose, Lactose and Gluten!! In other words anything with natural sugar, milk products and bread!!!!!!! I was told to avoid those food groups FOR THE REST OF MY LIFE!! OK, what else is there? How is this possible? Apparently these food groups are causing my nausea and stomach pain.

Questions I have:

Why is this happening NOW?

What can I do to improve my enzyme levels?

When can I eat normal again???????????