Good Day. I Hooked Up With This Guy I Met

Good day. I hooked up with this guy I met online. We didn't have penetrative sex, but we have each other orals. The moment I went down on him, he released his precum before I took him in my mouth. I tasted something salty-metallic-sour taste. Is it precum? I'm worried that I might be at risk for getting HIV just in case he has it. How risky I am? The next day I experienced sore throats and it developed to colds, and I also ended having cough. I'm worried that this might be caused by the oral that I gave him. Is this possibly related to HIV?