So I had sex 4wks ago around ovulation... Back my period was 3 days late and lasted only 1 1/2 days and was light and stopped suddenly. Since then I have felt sick nauseous quite a bit and my books are on and off sore and itchy. The I've been peeing a lot as well and I just have a really foggy brain(idk if that's a symptom)

My aerolas are staying puffy and wide even though it's freezing cold outside and are darker. Is it possible I'm pregnant????