Temperature is really important in medical marijuana use. I use several types of MJ without much "buzz", pretty much daily. Get a vaporizer if you don't already have one, and go for 375 or above - then you get all the bennies of MJ, but not so much "buzz" and stupidity. This has been well documented, but is often ignored by medical users who think pot is pot. It's not, it's not. Since your problems are GI, you may also benefit from eating it - especially the leaves processed with fruit, into juice. Variety of the plant and temperature are critical. Hope you get some help soon. Amazon has some decent medical marijuana books. Get them and read up.