One of my twins was a bedwetter, much to his brother's consternation. This progressed to sleepwalking, which really alarmed me. My husband's family considered this completely normal (my husband's sister broke her nose while sleepwalking, and had hair-raising stories about walking outside the house. Bedwetting was almost universal in a family with 8 kids when they were little.)
We all learned to cope, and I haven't heard about sleepwalking since their early teens. They're 27 now.
I guess what I'm saying is that your son needs to keep his inheritance from you in mind, and most likely he'll be fine, as you are. Learning and avoiding possible triggers is the biggest thing to keep in mind. vasovagal episode gives a good overview.