Pregnant or Nerves ?

I haven’t got my period, I’m 16 days late. I just recently went through a break up last week, but I was already 7 days late when We broke up. Is this just stress or could I be pregnant? (Yes, we were having unprotected sex🙃, he was my boyfriend of 2 years)

It’s been snowing really bad, I haven’t been able to test but I feel nauseous all the time, cramps and I’ve been getting headaches like crazy.