Went from 0-100 real quick

So Iv been taking the clear blue digital ovulation tests (the Bluetooth ones) I started taking them 8-15 although my glow app and the clear blue app said not to start testing till the 19....my doctor suggested to start earlier (since Iv had a hard time trying to conceive) and said once I got the “high” sign to test twice a day one with Morning urine and then again before bed till I got the solid smiley (or the peak sign) My suspected ovulation date according to glow and the clear blue app was the 23rd so my fertile window was 19-24th! So from the 15-18th I got low fertile sign with first morning Urine.....woke up today and tested with first morning this is suppose to be the first actually testing day according to the app and I got a solid smiley which means it’s a peak day and I’ll ovulate in the next 24-48 hours So I went from low fertile straight into peak no middle man not low high and then peak just straight into peak! It’s crazy because before I was testing with these tests I was just going off my predicted ovulation date according to glow and trying for closer to that ovulation date but I guess I ovulate at the beginning of the fertile window not at the end......has anyone ever had this? Went from no smile straight into peak?