I have low water pressure and the water has a surging and subsiding pressure variation through the pipes.

Your well pump system can be adjusted to give you a service pressure that will meet your expectations. The surging of your water coming from your faucets is a sign that the air change in your water tank is out of balance with your pressure switch or the diaphragm in the tank is torn. Your water tank may need to be replaced. The surging will eventually lead to pump failure. Contact a licensed well contractor to inspect your system for this problem.