Welcome WhoamI, I too am on day 2 of my upteenth million time at sobriety. Pot is my DOC, though a good bottle is always handy when I can't get the bud. Fortunately the physical withdrawals from pot are pretty mild, but I think it's really the psycholgical efffects that cause most people to go back out anyway. Your mind plays tricks on you and tells you that it will be ok, different, better, whatever, this time. We of course know that is a bunch of BS!!!
I'm sure I could give you lots of great advice, but being I seem to have a real problem following it myself, I'll let some folks with a bit more time give suggestions. Best suggestion I can make...keep busy. Take care.