What is going on with my body?

Yesterday I noticed some brown discharge which I know is sometimes normal for me. Today I'm noticing blood bit the catch is that my last period ended last week on Wednesday. I'm on the birth control patch and was two days late changing it for this week but I never crash that fast. before my last period I would be a day or two late changing my patch but nothing woukd happen. last week I put my first patch on Monday like I would normally do. I did stay with my boyfriend for a few days. We did mess around but we did not go all the way. and last week was my safe week. I was supposedly going to ovulate this Friday according to another chart I have. What could be going on? Am I crashing due to my patch or is Somthing else going on?