Hi, antihawk. Welcome. Certainly stopping your consumption of alcohol is a positive step forward in many ways. Making changes earlier in life is, I believe, easier than later in life when alcohol dependency is far more likely.
I can't speak to your symptoms. You should see a physician, as what you describe could be several things.
With regard to when do you start to feel better, more "normal" after quitting? Everyone is different. I slept better after about two weeks, felt much more myself after around three months. It took about a year of sobriety for me to feel healed and whole again.
Good luck.