There have been a number of times where I've had panic attacks and experienced no depression at all. I almost just have to laugh it off because it is so frustrating! (I'll pick out something funny that happened, like buying too much of something in a store because I wasn't paying attention and so on)
Sometimes I get depressed with no panic at all too... it just depends.
It could be hyper-thyroid so I would definately get that checked. I've had my thyroid checked three times and it's normal, so I know this darn disorder is not going to be as easy to fix as I had hoped.
Also, about 90% of my panic attacks or panic episodes... I don't think I'm going to die... I think either that I'm going to go crazy or faint.
Your panic / anxiety could have been triggered by the grueling 1/2 marathon race... definately something to discuss with your doc
So you've been feeling panicky a lot lately? How often do you get your attack/episodes?
TG~