Ovulation help?!

Manda • I`m 30 and have 2 beautiful girls
Okay so I have been using clear blue digital OPKs and I only got one day where it was positive and that was Wednesday. But on Tuesday I had ewcm and a lot of it! Does that mean I ovulated on Tuesday, Wednesday or both? And if so why did the OPK only give me one positive?! Very confused! Any advice would be really great 😊