Yesterday  I went to coworkers house and he was doing some maintenance at garden.I helped him for around 5-10mins. 

I used his screw driver to tighten some screws he handed me and move some small boxes he passed to me. Suddenly I noticed  a 5-6 inch long scrtach on his forearm (not deep) . It was not actively bleeding. But blood visible (it was red) on the scratch wound and it was not covered with a plasters.  I didnt ask when it happened, but at least before 10 mins.

As I have OCD  left the place and within 2-3 mins I washed my hand and used sanatizer on my hands. 

I didnt touch his wound or hands. But what if his blood touched  the screw driver and other equipments and then it may contacted my hands. Also blood could pass through from equipments to my skin via gloves as they are not waterproof.

1.If he is infected what is the risk I am getting HIV if there were blood on screwdriver or any other equpiments he touched then came in to contact with my hands?

3.Later that day I felt a pain on my thumb cuticle. Can I get hiv if the same screwdriver hit my finger via gloves resulted a tiny scratch  without bleeding?

4.Can I get any other blood borne infections from this?

5.What if I touched a equipment directly without gloves ?

Having carefully read your current question, and the exposure events you now are concerned about, Dr. Hook's answers still apply. Hence the answer is a resounding NO to all six of your new questions.

Please do not expect any more detailed replies than this. We are not a site for confirming what people with OCD mostly already understand, or for resolving issues causing anxiety. Given your OCD, undoubtedly you understand that simply understanding the scientific facts never is enough; there's always another "yes but", "what if", or "could I be the exception" sort of question and we will not play that game. If you are in counseling for your OCD, you could discuss all this with your counselor.

I do hope these comments help a little bit.

HHH, MD