Muscles Fasiculation. In body weight!

Sir/, ma'am I am having random muscle Fasiculations since last 5 months all over body approximately 20-30 times a day. Further difficulty in sleeping and change in sleeping pattern. Feeling of low tremors in the body like legs ,hands and fingers. Tremors in thumb is most prominent most when I bring it just below my index finger and least when I take it away from it. Loss of libido I m taking multivitamins tablets since a month but things are not improving. These problems are not interfering with daily activities. Kindly guide on whether it's a common thing or a grave concern. Family history-no neurological case in parents.However,maternal grandfather was Parkinson affected. No loss or gain in body weight Thanks