Anxiety or Something Else? Have You had this happen to You?

I am trying to discern if my, I'm going to call them ticks, are anxiety related or something else. I have an issue of humming, a lot. Sometimes it isn't so bothersome whereas other times it drives me mad. Christmas songs, songs I haven't heard since a child. repetitive lyrics, and at times just some random tune. It is embarrassing when my humming becomes audible to others cause it tends to be repetitious. I will hum and eventually become aware of it.
Then there is the inessive rubbing, a lot of times I don't realize I am doing it until someone asks me if I am anxious or ok. I have mentioned it to my pdoc and therapist. Pdoc did some med changes and it really didn't help. Both have said it is self soothing. The rubbing don't bother me so much but the humming, oh the humming.... The only way I can control it is to be engaged in something, mentally and physically. I am not sure if it is stress related or anxiety related as the two tend to go hand in hand for me. When I was on a high dose of gabapentin my anxiety was good but now I have been taken off of it, I feel it more. Life has been a wave after wave of horrible luck for the last two years. I try to not stress stuff but honestly, half the time I don't know what is going on in my brain. So then I question, distraction or soothing? The humming does drive me insane at times. Any input would be appreciated. If something like this has happened to you, please share your experience.