What to do?

Hello

I'm a bit nervous/uncertain

I was supposed to get my period on May 19th, but it didn't come. I've been testing negative for days. Today's pregnancy test was negative; ovulation test shows one dark and one light line. That should mean I'm about to ovulate. But I can't imagine it. I've only had my period once a month for years. Would you contact my gynecologist just to be on the safe side, since today I'm already four days late?

Thank you in advance

LG