My cycles are long and irregular my last period was very light and last only for 3 days I started taking letrozole on day3 for 7 days later on Day 12 I got my line close to dark so I started checking my ovulation more frequently n rather then getting darker my lines started fading away. Here is the pic

Today I got my new pack for OPK so did test today on 29 and it came out so good does it mean I am ovulating???? Please help ur response would be appreciated