Period 40 days late!!!!!! but no sex?

Laina • GIRL POWER!
Literally have not had sex in 8 months, so it's quite impossible for me to be pregnant. Unless it's a second Jesus. 
I thought it would come back at day 30, but my period is late by 40 days. That means I haven't had a period in 70 days!!!
Has anyone ever experienced this? What do I do?