Hi - yes, you are for sure overreacting. :)
First, if herpes was this easy to transmit, every single person would have it. You'd have it already.
Second, assuming he had a cold sore (and not a pimple or a burn or whatever), and he touched his lip, then sometime later, he shook your hand, if there was virus on his hand, it wouldn't have survived the exposure to air.
Third, ocular herpes almost always happens when someone has the virus themselves and it travels up the nerve to the eye, or they are newly infected, touch their own outbreak, and then immediately touch their eye.
As for him examining you, the skin on your body is too thick for the virus to infect. Mucous membranes, like the mouth, inside your nose, eyes, and genitals are concerns for herpes infections, not intact skin on the rest of your body.
I don't want to freak you out, but you do need to know that you could have hsv1 and never have symptoms. You may have it already. If you want to know, ask your doctor for a type specific IgG herpes blood test. The good news about having it already is that you can't get it again, meaning you can stop worrying about this particular germ. :)
Are you under care for your OCD? If you aren't, you should talk to your doctor about it. There is help for it. (I say that with only compassion, not criticism or judgement.)