Plan B

My boyfriend & I had sex for literally 2 seconds without protection & then used a condom after. Nothing came out we are sure of. I took plan B pill within an hour just to be safe. 6 days after I took the pill I bled for two days. The blood was bright red & heavy. I have also had mild head aches on & off. My period isn’t supposed to be until next Friday May 24. I am lowkey stressing about this. Am I pregnant or is this just a plan b side effect?😂😂