Am I pregnant

Is this spotting? If not why is my discharge coming in spots. I’m worried. I had sex 5 days after ovulation and got my period 4 days later but then after my period I got all the pregnancy symptoms. I feel nauseous all the time, my head is pounding and then this and my lower back hurts. The sex was protected and he says he checked but idk. I just finished ovulating and my next period isn’t until 2 weeks