A very good friend of mine in recovery once told me that people will line up to kick you in the ass so quit being so hard on yourself. The fact that you were able to get off methadone is huge. Check with your state board on the steps you need to take to reinstate your license. Don't be in a rush - remember periods or change are the most dangerous for addicts even when we've been clean and sober a long time. Expect to encounter a lot of red tape and hoops to jump through but many of us have been able to return to patient care and the life we love. Go slow - if you have a sponsor stay in close contact - send me a private message here anytime - I sometimes don't check in for a day or two at a time - but I will respond.
Peace and Namaste
Hppy