Fertile cm??

Sh

It stretches about 3-4 inches without breaking. Second day with it, but I’m only on cycle day 9. I got my iud taken out on July 10th had 5 days of bleeding then I had my first real period August 19th-22nd and spotted when I wiped only on the 23rd. My cycles are never the same amount of days each month it ranges from 25-28 days. I don’t have any opks either or live near a store that sells them.