Confused.

Okay long story short I messed up and didn’t use protection. So, I got off my period. Had unprotected sex two days after, he came inside me, I took a plan b the next day. A week later I started spotting and I thought it was my period maybe? But it was too early for it to be my period again. I spotted for maybe two days. My boobs hurt, I feel sleepy all the time, I have horrible stomach cramps. Is there a possible chance the pill didn’t work? I want to take a test but I think it would be too early. My next period is in 9 days. This happened on 9/30.