learning to manage/cope with the anxiety is pretty hard to do when you abuse or use daily it does change your chemistry around... it is part of the withdrawl, your head is trying to scare you to use again but you should not be scared to stop. i dont know the extent of your use, just go to a 3 day detox. they will hook you up with meds to help with all the nasty shit and monitor your heart. there is no shame in it, infact they will probably treat you really good since you volunteered to admit yourself. Paying for it, there is usually grants or finical assistance if no insurance.