Can someone tell me what a surge is

oraya’s mommy💕

I just went thru the most confusing thing with opk i just had a negative opk yesterday My fertile week hasn’t even begin yet according to the app i just tested like 30 minutes ago got a positive and now i have a negative??? Like wth

The light one is from yesterday the rest is from 30 minutes ago

And this is from like 5 minutes ago???