I need some help and information on early pregnancy symptoms

I feel like I'm pregnant because I had unprotected sex four days before my ovulation according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a>. I'm only young and I kind of want hints to know is if I am , my cycles are long and my is  period doesn't come in two weeks but I want to know some early pregnancy symptoms other than a missed period. I just have an odd feeling , can anyone say opinions or experiences?