Pregnancy Symptoms

If I just had sex yesterday, would I already be feeling different if I'm pregnant? I'm not TTC and I don't think about having a baby because I'm a full time nursing student with a job. I had a dream that I was pregnant last night and when I had my baby my boyfriend wouldn't put him down, he was so infatuated with him. He also saved us from an explosion.? Anyway, my last "period"  was Novemeber 27th and 28th and it was just kind of spotty, but we had unprotected sex last night after he had already came. (He just put it back in when he took the condom off and kept going) I took my birth control about 4 hours late yesterday and I've been forgetting the past few days. But all day I've just wanting to cuddle and sleep and I've been crampy which usually doesn't happen at all. Is it too early for symptoms?