I took PEP after 42 hours of HIV exposure. Am I safe?

Hello doctor,

I had protected vaginal intercourse with an HIV positive woman and I had taken PEP after 42 hours of exposure. I was texted negative at the baseline with PCR (Polymerase Chain Reaction) RNA (Ribonucleic acid) test and post completing PEP (Post-exposure Prophylaxis) my blood was drawn again for PCR RNA test and it took five days to get the results. I am very happy that the result came out to be negative. The day after drawing my blood for lab test I experienced persistent pain in the neck for almost two weeks (the area around lymph nodes for two weeks) and I immediately went to the doctor and he examined my body and neck to see if there are any swollen lymph nodes. He concluded that there are not any swollen lymph nodes and I am wondering the reason behind this pain. It has been exactly 60 days after the exposure and 30 days after completing PEP. Have you seen anyone who had protected intercourse and completed PEP and later seroconverted. Does PEP delay seroconversion? If not, why does CDC (Center for Disease Prevention and Control) recommend testing up to three months after exposure? Have you ever come across a PEP failure? I would like to do another test for peace of mind. Do you advise me to do now or do you want me to wait for few more weeks and take the test?