Scarleteen

Hi,
I had unprotected sex in September (only used withdrawal) and had missed some of my BC pills so I took plan B about 70 hours after the risk. Since then my periods have come on time but the consistency and length have changed. My periods now a lot shorter (3-4 days vs 7+) and stickier. I’ve taken 3 pregnancy tests all with negative results. Can plan b be the cause of my change in periods?

It could, but you know, they also could just be changing on their own.

Looking at your age, it's usually around now or in a person's early 20s that periods start getting shorter and lighter -- and often, thank goodness, less crampy, if they were -- than they were in the early teens. But the pill also often creates these kinds of changes.