After being sick for a few months I was diagnosed with something doctors renamed as nervous stomach?

Well I have never been given medication for it but I get bad stomach aches to and my doctor just told me it was from stress. It never really leaves unless you can find a way to manage your stress. For me I will still get them from time to time but mostly it's settled down a LOT. I used to have a stomach ache daily when I was 9-13 at 14-15 it became like 2 times a week and 16-17 has been like only 5 times a year.