not sure where to turn.

hi all,

Just want to tell you a bit about myself. I'm 45 years old and always had a feeling something is not right. At school I couldn't deal with large classes of 30 plus and was consistently getting in trouble and ended up being expelled from 2 high schools and banned from all schools in my county. I ended up going to a boarding school with specialist staff and classes of only 5. I found this quite easy to deal with. I have always struggled with big groups of people and have always had a small group of friends. I can't cope with waiting in line for things or crowds. 

Work has always been okay of I have a routine and stick to it. Any changes to my routine I struggle and can have what i call mini episodes where I fear the worst case scenarios will happen. About a year ago I got promoted at work to a manager and my routine completely changed. This led to me nearly quitting the job and going back to my comfortable routine. I didn't as I had some really supportive colleagues who have helped me so much. What people have noticed is if I get a task I focus on that and nothing else is important until that is completed. I also obsess with getting things done and hate leaving things. I can be at home stressing about things at work that are not really that important to deal with but my head says they have to be done. 

I think when I was young in the 80's I was just classes as a naughty kid and that was it. It's only now some people at work I trust and tell them some of the things I feel say that it may be worth going to a doctor and see what they say. Sorry for the long post at this time of night but I'm starting to threat about it and want to talk to someone.