Qatana

Meditation can produce all kinds of physical sensations. It would be very helpful if you could get some Instruction, if there is a Buddhist temple or other meditation school near you. Do research any teacher very carefully, make sure they are well known and accredited in some traceable way.
And the purpose of meditation, in very simple terms, is to learn how to not let Things Get to You.
Aikido helps with this as well. It can be considered a kind of moving meditation. And helps you learn how not let Things Get to You...