HIV/AIDS pathogenesis is not that quick. It takes years to develop the apparent symptoms.

I recommend you to get your neck checked. Pain for extended time is not really a good thing.

Anyway, if you are a frequent patron of these massage parlour or you are into sexual intercourse with multiple partners/sex worker, you need to get yourself screened regularly. There are worst STDs out there than HIV, and I'm sure you don't want to spread the disease to your loved ones.