Hi Tinker
Welcome to Mystic Board.
You had a interesting experience. it is quite common to get different sensations when holding crystals, some may make your arms feel like lead, some may make them feel hot ot tingly or cold or buzzy, heavy or floaty, so many different feelings.
Personally I would have made sure you put that crystal down and didn't pick it up for a long while until you understood more about their power and energies. It does not sound like it was helping you at all but rather straining and sapping your energy.
Can you tell me anything more about the crystal?
Did you buy any ?