My period ended June 20th. When it came time for my fertile window, clearblue came up with me having 9 days of high fertility which never happened before. I ran out of tests and threw the reader out not knowing I shouldnt have done that if i wanted to keep testing to find my peak day. I bought the same clear blue digital advanced and when I tested next day it said no fertility. 😥 so now I dont know if I ever ovulated cuz when I read the packaging it says dont use a different reader in the middle of a cycle. I didnt know that. I read somewhere now that the first use of the reader is a baseline for testing your urine and always comes up low fertility. So I will never know if I ever ovulated because I was on vacay when I was testing and didnt remember to bring my thermometer to check bbt. I do not have pcos but so sometimes have irregular cycles and just got off the iud in march. Glow says period is 3 days late but with all those high fertility days I'm not sure if that extended my cycle drastically. Should I test now or not?