lybrate-user, at this point, we need to identify why you are having these symptoms. It can be because of too low blood pressure
(116/75 shouldn't cause it), too low heart
rate (or pulse), low blood sugar, or other causes. Next time when you feel like that, get to nearest healthcare facility and at least get these things checked.
It may be a good idea to check with your doctor as well in case he/she wants to change your medicines.