Opk tests

Help! So I am new to ttc community. I started tracking my ovulation this month. On the 3rd, it looked like I was either barely positive or positive... my test the next day looked the same. The 3rd day it was negative. The 4th day, was negative. Took a few days off. THEN on March 10th I had an obvious positive opk test. March 11th, also positive. March 12th, positive. March 13th, negative. Then today, I had another positive. Why? What does this mean??? I’ve been using clear blue and was told that they’re pretty accurate?