TOWEL AND EJACULATE

I'm a 32 year old male. On the 4th November I had a sexual contact with a guy of unknown HIV status. We kissed and had mutual masturbation, he ejaculated on my groan area. He also performed oral sex on me as well. Right after the ejaculating, we wiped the ejaculate with a towel. Directly after wiping himself, he placed the towel on my face. I closed my eyes, and threw it away. Shortly after I washed my face and irrigated my eyes, to be sure nothing went in my eye.
I don’t know if anything went in my eyes but it did worry me a lot. One of my eyes were irritated for a few days after that episode. Since the 15th I've been feeling feverish, sore throat, abdominal discomfort, and general fatigue with aches and pains this has continued the past few days. I have checked my temperature with a thermometer with no signs of a fever, despite my face always feeling warm. I had a fourth generation HIV test (Ab and Ag,p24) and my results came back negative.I am also on prep currently as well.
1. What is my risk of exposure following this incident with the towel potentially contacting my eye? 2. Are my symptoms seroconversion symptoms? 3. This man said he had a few partners in the past 1-2 months and had a HIV test on the 6th November and results came back negative. His STI/STD results all came back negative. If he was in the window period and had possible HIV exposure on an earlier occasion, would be risk profile change? I also had a paper cut in my hand that had happened a week before this incident which appeared to be healed but with no active bleeding. 3. If ejaculate came in contact with this area, would it pose any potential risks for HIV acquisition? 4. Do I need to be concerned with this exposure concerning HIV?
Your advice would be highly appreciated. Thanks in advance