Moving to a recumbent would help.
You would be closer to the ground if you did faint, so hopefully would do less damage if/when you fall off next.
But as for a recumbent trike ??
Its a question if you fainted and did not fall off, where would you end up as you'd keep on going untill you got control again ??
Going uphill, you'd probably be ok, traveling sub 5mph.
Going downhill is more iffy, as you'd be traveling at +20mph.
But go for it, if it got you out on a bike more.
Luck ............