Я делаю… I – V1
Вы делаете…? Do - you – V1?

I examine a stomach.
Do you examine a stomach?

У меня болит… I – have a
У вас болит… You – have a
У вас болит...?
Do - you – have...?

I have a stomach ache.
Do you have a stomach ache?

У меня … I – have
У вас … You – have
У меня…?
Do - I – have...?

Do I have gastritis?
I think, You have pancreatitis.