Late period

I am 2 days late on my period. I’m regular in which they would come every 24-27 days. I haven’t had any symptoms except for cramping which happens before I start my period and some light bleeding around 2 weeks ago but unsure if it was just a symptom from a plan b I took 2 months ago. I am literally freaking out because I am simply just not ready. I don’t know how much longer I need to wait till I need to take a test.