As I previously answered, only revision surgery can improve the results you have. Best to virtual consult with so a discussion can issue after seeing you in action live. Expect fees to range from $15-$25,000.
That's an extremely strange side effect of getting botox injected to the forehead, given that there are no saliva glands there. Are you sure they're related? I highly doubt it would happen again unless you have some very unusual possible autoimmune condition going on.
Normal saline and bacteriostatic saline are not the same. Bacteriostatic sodium chloride has an extra ingredient that helps to inhibit bacterial growth in the vial. It makes it appropriate for multi use vials.