Ovulation question?

Ayannna • 20 Yrs , mother to a beautiful 3y/o , engaged 💍, TTC#2 💕 .

Has anyone ever had 4 days of strong positive LH SURGE ? first cycle using opks just wondering when should the line start going away or get lighter ? Original fertile window started Monday but everyday that I enter a positive opk test it goes a day back and projects my period for a different day ?