Help! Plan B

Hello all!

Last week the condom broke but my boyfriend and I were unaware for how long it was broken for (probably less than a minute.) He hadn't cum yet and there was no reason to worry except for precum which I know has a 1% chance or something of fertilizing an egg.. but we took the pill JUST IN CASE anyways.

The next day, I noticed that there was some blood on my piece of tissue paper from wiping after peeing. I found it weird since my period isn't due to come until the 8th of February...

But tonight, at least a week later, I'm spotting like CRAZY. When I wiped after using the bathroom, there was brown blood. I wiped a few more times to see if I was bleeding and sure enough I was.

What does this all mean? Should I be worried?