3 nights ago I had brief 60 second sexual inter course with a high risk woman, since then I have had throbbing dull pain in my pelvis, is this HIV??

Unlikely. Infection by the HI virus will not give you immediate symptoms or even for a long time.Which is why many people do not know that they harbour the virus.Should this happen again ,ensure you get post exposure prophylaxis within 24 or at most 72 hours.As a precaution,you should see your doctor for medication to cover you for other infections you might have been exposed to.