Hi Nanci
Often times when the utility neutral comes loose the water main ground and carries the load of the house. If that connection is poor this could be your problem. When you are wet your body could be at a lower impedance to ground than the water pipe. Some of the electric current passes through you and some through the water pipe.
Do not use the shower untill this is fixed.
Do not try to fix this yourself
Call and electrician
Call the utility company
