Opk help

Lisa 👫💏 TTC #1 👶 furmummy 🐈

Ok so I usually have a 27/28 day cycle there always on time but am really confused I have been taking opks from cycle day 6 and nothing I am supposed to ovulate tomorrow I usually get a positive opk on cycle day 11 and ovulate 36 hours later I usually get ewcm few days leading up to ovulation but I have been dry past few days the only time I got ewcm was the day after my period finished.