In December I started a new job and even though I love what I'm doing and my colleagues are very nice and friendly, I can't get myself into other activities without thinking about some work stuff. I've always been very responsible but now it seems to cause problems as I feel nervous and worry about doing things perfectly fine and on time all the time. I know there is no reason for me to be that tensed about everything because I'm doing fine, but I still can't relax and calm down. Any advice?