Short Episodes Of Mild Dizziness Over Past 3-4 Wks, Increased

Short episodes of mild dizziness over past 3-4 wks, increased frequency. First ever bloody nose Wed. evening. Started at 7:20 pm after blowing my nose, (not forcefully), and immediately had heavy nosebleed. Went to the E.R, (urgent care facilities were closed), and the bleeding continued until appox. 11:15 pm. Was given a nose clamp and instructions to follow. Had 2 more nosebleeds within 3 hrs yesterday, and a non-cooperative nosebleed for the past 2 1/2 hrs. When I remove the clamp, the bleeding resumes.