Drama wouldn't be "drama" if it was about something that is, if the event is in proportion to the reaction it's not drama anymore so don't feel bad about that.

It is never "nothing" though. If it has affected you and has made you panic, fear or otherwise feel out of control, it's real to you. That's not to say that your reaction was in proportion to what happened and that's just something we do. it's not that it's wrong to be angry, sad, anxious or any of those things, it's that our overly emotional selves tend to do this to the extreme.

Accept that they aren't going to understand this because their emotions aren't as vivid and intense as ours are. Try to, when you're able to calm down, think about it from outside yourself and look at it in an unbiased view if you can and maybe you'll understand how, if you did, you over reacted. Then just let it go