I overthink negatively, anyone else?

Anonymous
I seem to have. A problem and it's starting to get a hold of me. If someone is 'off' with me I automatically think it's the way I am to them and it's something I've done wrong to them. If someone says something to me which I think is having a go, I think and think about it. I seem to put 2and 2 together and get 5. And them worry about something I have put together in my head without actually having the facts.
For example. I was messing around with a girl today and I gently pushed her on the shoulder. At the time she didn't say anything, however when leaving I saw her waiting almost waiting for me to leave before she goes. So now I'm thinking she was waiting for me to go before she went to our manager and put in a complaint about me. Sounds daft I know but I'm literally worried sick about this now. We get on well but she can be a bit of a suck up to the manager.
So does anyone else be like this? Am I mad, or is this normal?
I also suffer from OCD and have to check certain things.
I overthink negatively, anyone else?
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