Positive or Negative?

I'm late 5 days.Im 15 and I'm curious of what's happening with my body. I had unprotected sex October 29 and it happened to be a fertile day.🤔I haven't had any symptom of nausea.Once, I realized that I was late.I panicked and probably thought that I was pregnant. Which  did stress me out for two days.Afterwards I've been calm continuing on with life ,but I get these mild cramps,headaches,bloated,and have been tired right after school.Before all this I had problems with my period.What do you think it is?Help anyone???😶