Whether you want a scientific or non-scientific answer, the answer remains no. The immune system has the capacity to react to many stimuli simultaneously so, if you were to get HIV and another STD at the same time, you would expect the HIV test to be equally reliable. In fact, I've seen unfortunate patients who have gotten HIV and two other STDs. The HIV test still performed properly, without delay. If you have negative HIV tests at 4 and 5 months (well beyond the recommended 3 month period to be completely sure of your results), you should believe them.
In that this is your second post in a brief period, please also remember that clients are allowed only two questions within a six month period. I hope this addresses your concerns. EWH
Thank you for your support and understanding.