My other ovulation test today by different brand was negative. Today I got my clearblue sticks, decided to use them as I know I haven't ovulated as all other tests are negative. I use other brand tests and take my basal temp. I'm new to use the clearblue so thought I'll use this month to try and get familiar with the tests. However today I did my first test , first 2 had an error with a book , what a waste and 3rd one worked fine flashy stick then went to a steady smiley face which indicated peak. Its the 4 days one i got. I'm confused why I got a smiley face on the first test? I'm currently on cycle day 21 but I do have pcos and ovulate anywhere between day 18 to as long as 30s , one month 40s. I've never had an issue with my other brand ovulation tests. Easy at home and one step. How trust worthing are the clearblie for pcos ? I'm assuming now I've had a smiley I can no longer use the digital reader. I feel like it's been a complete waste of £20