Afraid of HIV infection

Sir,
Im a bi and around 2 weeks back I had protected anals with an unknown person.But he did a lot of fingering in my anal orifice and so it bleeded very little.But he was using a condom while inserting into and I remember that he din't even pre-cum in my anus nor did any fluid of his get in touch with my body.Later I had orals[mutual] for a very very short period of time...

After this encounter I really got depressed,around 1 week after the encounter I developed 'folliculitis',I visited a dermatologist[but I din't say him about my sexual encounter],he said that it is a very common condition and there is nothing worry about...

For my safety I got in touch with the guy with whom I had the encounter and he under went an ELISA test which came as -ve...But I feel that he could be in the window period



the problem now im facing is that the folliculits is growing worse day by day,even though Im on medication for it..The dermatologist also said that I have some fungal growth on my back...
Please Im Undergoing a mental trauma...

Am I at risk for HIV?
Please Im almost killing myself day by day due to mental trauma..