Welcome Confused. You know you have it in you to stop, you did it for 2 years which is a pretty amazing feat in itself. Addiction is a tricky thing and it can come back and haunt you many years later if you aren't vigilant as you found out.
The shame and guilt of the day after something we all remember too well, but if you re-double your efforts you never have to feel this way again. Perhaps you may want to consider a more formal recovery plan this time around? Even just posting here every day can do wonders.