i can only speak for myself, obviously. i'm sure things are different from person to person. but in my experience...i had terrible shakes. i had trouble sleeping, yet was sleepy. i was sick to my stomach all the time. cold sweats. it was a very rough 5 days. after day 5 i felt 10x better. i missed it for awhile, but always remembered how sucky the withdrawals were.
please PLEASE see a doctor if you need to detox. it is the safest bet. i did it on my own, but i was foolish.
congrats on your decision to quit. don't give up! i know you can do this.