should I test

so I usually track my period and ovulation but last month (may) I deleted the app and didn't track. well it's now June and I reinstalled this app. well glow usually is pretty close to being on spot when it comes to my period. when I logged back in yesterday it told me I was 10 days late and still no sign of af. anyone think I should test or just wait? I litterally had no period in May which is unusual. I usually will start around the 18th of every month and end 3 to 5 days after.