Welcome, wheekie. It definitely does get better but it doesn't happen overnight. We've done a lot of damage that takes time to repair--we didn't become addicted overnight and it will take more than a few days to really feel better.
There is a phenomenon called 'kindling' where each time we drink again and quit is harder than the last. This has happened to me.
Have you thought about seeking medical help? There are meds that can make withdrawals and the crippling anxiety much more bearable. Please don't feel ashamed to seek help--I was, but I really needed a LOT of it to get and stay sober. I hope you stick around here and post often--this is a great group of people with lots of advice and experience. Wishing you all the best--and day 5 is awesome. It's inspiring that you're keeping up the fight--don't ever give up.