Welcome to HCM.
Earliest manifestations of HIV
can occur only after 3-4 weeks after the risky contact or exposure.
So the diarrhea
and sore throat
followed immediately after your sexual contact could not be due to HIV and may be due to various other reasons like your food habits, close intimacy with persons with cold
or sore throat etc. Moreover your's was a totally protected contact. So a HIV infection through this contact is unlikely.
There is nothing to worry.