My mind just doesn't want to believe the results....

Congratulations on asking your partner if he had STIs or HIV- most people answer honestly making this a relatively low risk encounter.  Like the doctor whom you consulted, I would have been ambivalent about prescribing PEP- I'm not sure you needed it for the encounter that you describe.  Having taken it however, as shown by your testing, you can be completely confident that you did not acquire HIV, gonorrhea, chlamydia and syphilis.  As a result, your partner was not exposed to HIV or any STI.  You can be completely confident that neither you, nor your partner have an STI as a result of the encounter you have described.  It is time for you to accept these results and move forward.

In regards to your response, I just want to make sure that I was clear that this was MSM (Man sex with man) 

& Also that the person I was worried about exposing to HIV was my partner(who I may or may have not had unprotected sexual relations with during me taking pep, but most likely didnt) 

But who is also negative for HIV after 5-6 months after taking a couple rapid HIV tests. 

So after 7 months and his couple HIV rapid tests, can I be 100% certain that he doesn't have HIV and that we don't have to retest? 

My doubts are definitely coming from my guilt but I am doing all I can to move forward and never repeat these kind of mistakes again.  I appreciate your time Dr. 

From your test results, it is simply not scientifically possible that you exposed your partners to HIV when your tests were negative- that does not happen.  

Once again, I will re-state that your test results conclusively show that you do not have HIV and that it is scientifically impossible for you to have exposed partners to an infection that you do not have.  EWH

Now if you don't mind me asking, I have one more question. 

A little over 2 months ago, I had unprotected oral sex with a man. 

The exposure was only about 3-5 seconds. There was kissing involved, he performed oral sex on me very briefly and I performed oral sex on him very briefly as well. No ejaculation happened & neither of each others penis even touched our throats. That's how brief it was. He also rubbed his penis against my buttcheeks but anal sex was not performed. Nothing more was done. He didn't insist on anything else but he did mention a couple of times that he was STI/HIV- and on prep. 

Before 48 hours, I was prescribed doxycycline pep, (2) 200 mg tablets. Took them as directed. 

Following that I tested for STI's & HIV on day 13 and day 27. Urine, throat & rectal swab, and blood drawn from vein for syphilis & HIV . All results were negative. 

Following that I've been getting HIV rapid fingerprick tests done here and there up to just a couple of days ago, still negative. 

Even the people that work there have insisted that you can't get HIV from oral and that my other results are conclusive. 

With that being said, do you think it's necessary to retest at all for all STDs/HIV or can I 100% put this to rest finally? 

And also I have not had any symptoms during this whole timeframe.

Your friends are correct.  There are no proven cases of HIV acquired from receipt of oral sex.  When performing oral sex on an untreated, infected partner the ESTIMATED risk for acquistion of HIV is less than 1 infection in 10,000 sex acts (the risk is estimated because there are too few cases to study).

You certainly do not need more testing.  I advise you to move forward without concern.  EWH