No AF 13 DPO

Im 2 days late for AF I got couple vfl on pregnancy test. Today negatives but got a high LH test. Which is unusual usually if I do a LH test strip once ovulation is over theres only 1 line. Im 13 dpo today. Last AF was August 20th ended the 24th. I got my peak on September 3th and 4th. Am I testing too early? Has this happened to anyone else you were pregnant?