Hello Charlie and welcome to our community. Sorry that you are having to go through this .

Many here have had LPs, including me. Mine weren't anything to write home about but some have found it uncomfortable or that it caused a headache. Drink lots of coffee before hand and afterwards as the caffeine seems to prevent the headache that some get. Also drink lots of water the day or two before so that your body is well hydrated.

In the mean time, try to relax and do something things that you enjoy so you can take your mind off of the worrying.
Please let us know how you make out.

With love, Erika