So I take combination pills for birth control and my parents do not know. Because I sometimes have to sneak and take my pills, I may take them late by a few hours but I did take it every day. That was the only week I took it a few hours late. This was in April between 20-27

On May 1st, a Friday, I had unprotected sex and I took a plan b the following Monday. I was suppose to start my period on Tuesday, the 5th but didn’t start it until Saturday, the 9th and ended on Friday the 15th. a couple of days ago, maybe on the 20th, I noticed very light blood when I would go to the restroom. I’ve been spotting since them and I’m not sure what this could be... can anyone ease my mind ?