I would assume there are. It'd be weird if there weren't, honestly.
Yeah, probably not. Although that number of supers is growing as the universe expands. They've already mentioned Dr. Strange, the Guardians Of The Galaxy part of the universe will be crossing over, Quicksilver and Scarlet Witch are due in the next movie...
(Yeah, Sam is not a therapist. Not one fully licensed enough to do more than lead a support group, which would still require training, I'd imagine. But then, sometimes all you need is a listening ear that's not going to be as emotionally invested that you'd be afraid for them to find these things out.)