I had unprotected oral sex, do I have symptoms of HIV or STDs?

Hi,
I had oral sex unprotected before a week ago and it was my first time of it and then I read about the symptoms of hiv and other diseases and then I felt that of neck pain . Chill sometimes
So is that mean symptoms of hiv or other diseases or it’s because the stress from that as I been worried since I read about that and I don’t have fever but I feel hot
And feel like my body tired.

Thanks

Age: 26
Male
Medications: non