I think someone saw me self harm
How did you hurt yourself? Who saw it?
Because I accidentally dropped my tool on the floor, why else?
That is upsetting that you harm yourself. You shouldn't intentionally harm yourself. I'm hoping you will try and get some help now that someone has saw you.
It's only a scratch or 2 what's the big deal?
I don't think anyone will assume it was self harm if they saw it was an accident. Just be more careful in the future when you are working with dangerous tools.