Before I got the hand job I also used the penis pump so I worry that my skin had micro tears in the skin that would allow certain bacteria viruses to get in. I also used a more intense pain pump on the 5 October. 

Since then, I’ve had slight pressure in my urethra and peeing, and the inside tip of the urethra seems red. I am uncircumcised . Since the encounter I been having extreme anxiety about infecting my monogamous partner. I took a full panel STD test 10 days after everything came back negative, but I still worry that I will affect my partner. The symptom that is making me worry a lot is having numbness in my feet which I read could be a sign of herpes neurología and the tip of my foreskin feeling a bit wet/ moist . When I squeeze the head I do not see discharge  . I am also very stressed about syphilis 

While you do not know the infection status of your partner, statistically it is unlikely that he had any STI.  Even if he did, receipt and participation of masturbation, even when sex toys are used and abrasion occurs remains a no risk event in terms of STI risk. Your tests prove that you did not acquire the most common STIs such a gonorrhea or chlamydia.    I would have no concerns about other STIs, including HIV.  The same is true regarding syphilis risk.  

My suspicion is that the trauma of using the penis pump on several occasions, as well as perhaps anxiety driven self-examination may be the source of the pressure sensations you have noted (when persons are looking for STI symptoms, they tend to notice otherwise normal sensations that are normally overlooked) and repeated self examination may be contributing as well.  

I urge you to put your concerns aside and move forward without concern.  I see no need for additional testing.  EWH