Husband's Stomach Pain

My husband and daughter are both on the Doctrine that I have running on my T3. My daughter eats pretty healthy most of the time, but my husband does not and it's hard to convince him to, although it may not be the problem.

He has had pretty bad stomach pain that happened all of a sudden a few days ago. It comes and goes "in waves" which sounds to me like Food Poisoning, Samonella maybe???

I've given him Aloe Vera Gel, Probiotics, etc. and nothing is working.

Anyone have any ideas what this is and what we can do?

I don't want him to have to visit a Quack about this as I don't trust them...