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...

I think the first one I had was a dream, I was about five or six. I dreamed I walked into the kitchen and my mother was standing there... and I was terrified. I don't know if she was a witch or a good guy, but I'll never forget the dream.
Did you have nightmares as a child?
I typically feel this when I wake up in the morning. Some things I do to help:
1. Set my alarm to wake me using music that enjoy so that I wake to something pleasant that can get me going in a positive way. If this is happening at other times in the day, music can still be very helpful as it triggers positive emotions (assuming you are picking music you like that conjures good feelings).
2. 5 to 10 minutes of breathing exercises - slow deep breathes into your diaphragm (stomach) and then slow breathing out through your mouth. Its amazing how it tricks your body into relaxing. You can do this anytime (doesn't have to be morning). While doing this, focus your mind on your breathing. Don't think about your day or what is going on - get into a comfortable position, breathe, and focus on each breath imagining tension being blown out with each breath. Sometimes you might even find that your mind starts to wander off like you are about to fall asleep...this is good...that means you are doing it right (or that you need to get more sleep :-)
3. I come on this message board and ready about troubles others are having. Empathy is an amazing healer to ones self. Others are struggling just like you and I and if you can impart wisdom onto others, you get a betters sense of self - which ultimately calms anxiety.
4. When it gets really bad, I write down how I am feeling and any thoughts that are coming into mind.
5. Despite repeated advice from my GP and my therapist, I resisted their advice to get more sleep. I like to stay up late and watch TV....but this is counter to overcoming anxiety. Your brain/body needs sleep to heal and reduce inflammation. My GP said to think of anxiety as a symptom of inflammation in your brain. That is not to downplay the behavior and emotional aspects but it makes sense. Sleep reduces inflammation. So see what you can change your schedule if you are not getting enough sleep and try to fit some more in. I have made incremental changes that have added 30 minutes to an hour of additional sleep and it has made a noticeable difference over time. Nothing is immediate so stick with these changes. I also chose to cut out TV before bed and instead read a book and once I start to doze off, I shut the light and the book and I go to sleep.
These are just a few suggestions. You could also look up Progressive Muscle Relaxation (PMR) and the Safe Place Exercise.