Bee84 - it is horrible to be stressed out about work. Is there anything you can do on the way home to unwind? Some meditation, music, walking when you get home for 30mins - whatever helps you relax?
I have had to work really hard to detach myself from work before I walk in the door at home or to pick up my kids.
I also have tried to stop worrying about what might be....IYKWIM. It has taken lots of practice but honestly I look back at my time before and wish I had not given work so much of me. I do a great job still but I don't pay a personal price for it.
I hope things settle down soon for you - good luck!