Good Morning and Welcome to HealingWell. I have read your post and I understand how you can be feeling depressed about how things are going right now.
I noted you say you are lonely..........do you just pick up your phone and call your kids or Mother or are you waiting for them to call you. Take charge and make the calls just to stay connected with them.
Also have you had a check up at your physicians lately and talk to him about how your feeling. It is good to open up and let your Doctor know what is going on with you. You are paying his bill so do get your needs met when you are at the clinic.
In all situations that fuel your depression/anxiety, whether they be job related, family related or otherwise, try and think about all the things that you have done right. While its true that it is a good thing to acknowledge things that you can improve on, beating yourself up over mistakes you've made will only increase your anxiety/depression.
It's very easy to become self-absorbed with your own problems and challenges, but by looking beyond your immediate environment, you may find someone or somewhere where you can derive a great deal of satisfaction from helping others.
I know your on the road alot but remember you are never alone, we are here and we support you.