Super Late Period, pls help?

My period is late by 38 days... just missed my second period. And I’m on cycle day 73. 😳 Any ideas on what can cause this? I’m worried something is wrong, but the doctor literally tells me nothing at all and only offers the pill to “help regulate”. So i don’t want to waste money going again.. I’ve never been so late. And no positive test either. ☹️