I'm feeling a pulse under my eye on &off . its a strong pulse that just seems to come for a few minutes & goes again. is it something to worry about?

Sounds like lid tic: Common reasons for an eyelid tic (myokymia) are stress, lack of sleep, alcohol, too many stimulants (e.g., coffee, tea, cola, energy drinks/pills) and something locally irritating the eye, like dryness or allergy. I suggest trying to modify the above factors, take a break from contact lenses if you use them, and use otc artificial tears or allergy drops. If this doesn't help, see your eye md.