Welcome Effie, you definitely came to the right place.
It's my day 14 and I can say that this hasn't been the easy path but it definitely is the right one!
I had the same cold sweats, shakes, irritability, guilt, regrets..all that...
I tried to quit so many times.
Just try to understand that you didn't try to hurt anyone in your past on purpose. You have a sickness and you are not able to control it. I did so many terrible things I regret but I realized that to be able to get cured, I need to forgive myself. You need to forgive you and use all those negative memories as an inspiration to get better.
Just take it one hour at a time. It gets easier every day, I promise.
I wish you all the strength.