Any advice will help! Mahalo!

Ariel

I’m on my 48th day of my cycle and still no period. I have taken 3 clear blues and It was negative. This is the first First Response. I’m assuming I ovulated late? My period would start the 15-17 of May. Should I wait to take another as it gets close? Or should I got to the doctor for a blood test now or after IF I miss another period?