I had something similar last December. A big splash of blood on my cell phone screen. Weeks of dribbly nose just on the edge of a nosebleed. It finally resolved in late march. On a lark, I did an antibody test for COVID-19. Negative. Zero surprise since antibody goes seronegative 90 does after "recovery". I'm pretty sure it was something my wife brought home from work. I work 100% from my home office.
Thank you for sharing. I have used a saline spray and other things, but whenever my below my knees, like when I drop my pen or I sneeze, on comes the nosebleed.