16 and possibly pregnant..(HELP)

I had unprotected sex with my boyfriend when I was ovulating and I didn't realize that I was ovulating until I looked at my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period app</a> and I was like shit by that point it was too late. Soooo At 11 DPO I had light spotting and it lasted until 12 DPO I am now 14 DPO and AF is 1 day late.. could the spotting have been IB? and ive also been tracking my symptoms I had light cramping and twitching feelings where my uterus is located... I'm also really nauseous when I lay down or when I get up in the morning.... And I'm also peeing a lot more (which is one of the most giveaways for some women) sooo could I be pregnant?