Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

It's difficult to enjoy when your brain is full of the situations you mention, yet, it can be the best thing you do for your self is to take the walk for you, look for things that you find interesting, and sometimes, you meet a new friend this way.
Best wishes.