Spotting ?

I have been on birth controls for year now and know what is normal vs what isn’t normal for my body. That being said I’m so confused, I am on the patch. I have my last patch on and it won’t come off until Saturday. My period isn’t due for another six days. Today I was having light cramping, I didn’t think much of it I just thought it was because I hadn’t eaten all day. I got to the bathroom and my parties are stained and I am spotting. I have a boyfriend and we do have sex very often. Should I be concerned about pregnancy? I was at the doctors last week to get lab work done and they also did a lab(blood work for pregnancy) which came back negative. Should I take another rest soon ?