I am a 26year old male. I had a casual encounter with a 38yr old male three weeks ago. We did not engage in any anal or oral sex. We agreed that I would masturbate and he would watch. I briefly touched his penis with my right hand during the encounter. I ejaculated onto myself and I watched him ejaculate on himself. During the encounter, he took pictures of me with my camera (which I've deleted)

Before I left, I picked up the camera and put it in my pocket. During my walk home I touched the inside of my nose and when I got home, I believe I may have taken off my contact lenses without washing my hands. I don't know if there was any cum/precum on the camera, but for the sake of argument, if there was cum or pre-cum on the camera, am I at risk of HIV?

I seem to be fixated on the idea that semen/precum may have been on the camera and that somehow I put a semen into my nose even though I'm not even sure that actually happened. I've been so worried & losing sleep over this possibility.