STDs are not transmitted this way.
They are transmitted by oral, vaginal, and anal sex. They can also sometimes be transmitted by heavy rubbing or grinding of the genitals.
You seem to have a lot of anxiety about going to escorts, but you continue to do that. Maybe it's time to consider not doing that anymore, and getting help for your anxiety.
This is exactly like other questions you have asked her. Hand jobs are NOT a risk for std's. Even if she had a wound on her hand. Hands do NOT transmit std's. Please make note of this so you remember it for next time and don't have to worry and keep asking.
Also 1 more thing. What if there would be some abrasions or small wounds that would cause some small amount of bleeding that I couldnt notice?