probably because you avoided your genuine anxieties by getting high, and now you're sober you have to reexperience them, plus their compounded interest on top of that [from buying temporary relief from them through drugs]
With every drink you took you did not noties how anxious you were.
You are starting to feel life as it really is. You are not self medicating anymore. The anxiousness will pass - do you have support? I was an active alcoholic/addict for over 40 years. I have been clean, sober and in recovery through the program and fellowship of AA. I learned how to be happy, too!
This is a normal part of early recovery - it will pass. For a long time you used drugs and/or alcohol to numb those scary feelings. Now you're having to deal with them without the "crutch" of mind-altering substances. Of course you're nervous! This does get better - stay with whatever program you're in, and ask every day for help from your higher power as you understand him/her/it. God bless, and have a beautiful journey in your sobriety!
Memories and cravings.<br />
It DOES get easier.<br />
18 months right here...cold turkey, no rehab, no counselling<br />