I grew up with both of my parents and the middle of 5 kids. We did stuff together as a family all the time but weren't the "huggy" type and didn't say "i love you much". My parents were pretty strict, and we weren't really allowed to have a voice and say how we felt. My parents always thought they knew how we felt even if we said differently. We didn't have a lot of money, I was really shy in school, never had a lot of friends. I was the middle kid and my mom did daycare so I never had much attention from anyone. I used to like being alone. I never talked much in high school and was always afraid to try talking to someone new. Nothing traumatic happened in it. I was a very sensitive kid, my feelings were hurt a lot. In high school I had huge self esteem issues and still do. That's about it.

I'm absolutely positive that your previous life experiences don't have much to do with your anxiety. There're other mental conditions which correlate with negative memories of the past, but not anxiety.

Anxiety i'm sure has a physiological basis to it. During a panic attack, massive amount of adrenaline is released into your system, that's why you are willing to scream and run for your life when it happens. But, seeing how there's no immediate danger, that freaks you out even more.

But, to stay on the subject, I grew up in a family where there non stop arguments about the most menial things. I hanged out with my friends a lot, did well at school, knew many people around the town, and didn't have to work because my parents were rich and provided me with everything. I learned what depression/anxiety/depersonalization is after a smoked pot. This condition is to stay with me forever, though it hardly ever manifests itself now. Still, every now and then I get my "healthy dosage of fun".