Ovulation?!

Hi peeps. Sorry if this is tmi just slightly concerned. The app says I've started ovulation and I've just been to the loo (no 2) and there was a pinky brown discharge when I went to wipe (front) had anyone else experienced anything like this?! Is it pretty normal if you've started ovulation? I'm terrified there's something wrong. Could it just be old blood from my period because I've strained slightly? Thanks in advance!