Oh I totally know what you mean. I LOST SLEEP last night, over a person I don't even know, worrying that I did something wrong to make him think I was rude. (a customer tried to come in after we were closed, and I had my hands full, and a phone tucked under my chin so I was looking down, trying to get into my car) and he was dropping off flowers for the office staff. Long story short, I found my key to get the door open, but he apologized at the end, and looked at me funny (probably imagined, that part) and I thought about it all night and tried to sleep and woke up at 2am this morning, worrying about a complete stranger! You can imagine how bad I get with someone I know and/or care about....
Totally feel you. I hope that I didn't ramble too much (but I am long-winded, sorry

)