Positive OPK

Courtney

According to glow my ovulation was the 20th but I bought the digital OPK tests and took them on the 20th & the 21st and it came up negative both days but I took one the 22nd, 23rd, 24th, 25th and yesterday the 26th. They all came up positive. My period is supposed to be in 7 days, is it possible to ovulate this late before my period? Any comments are appreciated!