Could it be stress or pregnancy?!

Could it be stress or pregnancy?

I've been under unusual stress lately due to college and my period was 3 days late when I had protected sex and ever since I've been really paranoid and stressed out about it. So much that I'll wake up in the middle of the night crying and shaking really bad. I wanna go to the doctor but I feel really shy and scared about going. Now I'm 9 days late.

You don't need to go to a doctor, buy a home test.