Welcome back to SR Drillbit. Anxiety is very, very common during withdrawals - especially after a long bender. If you feel you've got physical issues related to your drinking, seeing the doc is really what you need to do.
I was in a very similar situation, and I can tell you with 100 percent certainty that your family knows. Your addiction would love you to think that they aren't aware, but they know - trust me.
Don't let shame get in the way of getting the help you need - alcoholism is a very common issue and your doctor will know how to help.