What can one do about Physical Marijuana Withdrawal (gastritis and anxiety)?

I have gastritis and anxiety from smoking blunts everyday for the last 5 or 6 years. Needless to say the withdrawal is unbearable (severe stomach pains, tightness of the chest, no appetite etc…). I’m pretty sure there’s nothing really to do aside from just riding this thing out for a few weeks (it’s already been almost a week and it’s only gotten slightly better W/ MEDICATION).