Ovulation spotting?

Has anyone ever heard of ovulation spotting? I wouldn't know what else to call it. Glow says I'm ovulating today and today when I went to the bathroom there was the smallest amount of pink tinged discharge.  It can't be implantation spotting unless I ovulated a week after my period.... I have a longer cycle, about 41 days.  Any ideas?  Haven't had anything since... Not sure what to think of it.