I've been getting positive OPKs for 5 days. Is it normal?

Hi everyone, i am regular period (28 days cicle), so i started usig OPKs when my fertility windows started, the first one was negative but since the day that the glow's app said i will ovulating all my tests are positive. I had  positive opks for 6 days in a row.  Never happened before. By the way, i experience pink discharge between those 6 days. I am so concerned :(... Any thoughts???