It's possible you have burst your eardrum.

You really need to go and see your GP just in case.

In the event that I did what exactly does that involve. Will I ever get the hearing back. It's kind of important, I'm a musician

you'd probably notice if you burst your ear drum as there would probably be a very sharp pain. when you hold your nose and blow, you bend your eardrums out so its possible they just havent returned to normal - try yawning, swallowing, sucking sweets etc. the hearing problem might just be wax. see your doctor to put your mind at ease - you might simply need your ears syringed.

Trust me.........get some ear plugs now nad protect your hearing before you loose 30% in each ear like me. I too was in a bandfor everal years and I use to use warm olive oil in my ears to keep them cleaned out. I chewed gum t orelieve hte air pressure. This is not something you mess with trying ot hold your nose and blow until one pops.....I did this when I got back home from flying to Las Vegas, then drove a pateint to LA then flew back to GA ,last month........took me a week to get the air pressure under control! If it doesn't get better yes....go see a doctor!

this is why you dont want to do this. doctors will tell you not to do that as there is the possibility of doing this.

i dont think you have thouth as another said--youd have really sharp pain. id get into the doctors office asap