Am I pregnant?

1) My usual cycle length is 25 days

2) I had unprotected sex on cycle day 9 (3% chance of getting pregnant)

3) I am on cycle day 15 (ovulation is in 2 days)

4) I have not taken any pregnancy tests. (I’m 16)

5) I haven’t taken any plan B’s

Somebody please help me, I’m showing a few symptoms not anything like morning sickness or tender breast’s! But I do have back pain when I wake up, and I’m peeing more than I usually do.