When did I ovulate?

So I started my period the 13th of February and stopped the 17th well the day after I started using LH tests and kept getting low until the 25th that morning I got low and at 8pm I got positive and the 26th as well till today I got a low but it was still dark I guess I can say "fading" glow says I ovulated yesterday the 26th but going based off my opk when did I ovulate