The actual name of the medication would be helpful. If you have a prostaglandin analogue it may make your eye lashes grow longer. Infact a cosmetic version of one of these drops exists for just that purpose. Other side effects may happen if you have a beta blocker and are potentially serious if you have heart or respiratory issues. Long story short--dont self medicate.
No not to you or to your eye. You are not the first to do this so don't be too hard on yourself.
Your eye pressure will probably be lowered temporarily for a day or so. I doubt that would be bad.