Help! Questions about pregnancy! Possible TMI

So I had sex unprotected (yes i know stupid) on the 10th. He sidnt cum in me but i havent started my period and its 3 days late. I am ALWAYS regular, so this is odd for me. I havent been feeling myself lately. Not any normal period signs either. I always get constipated on or near my period and I have diarrhea so that isnt normal. I have had it a couple days. My back has little cramps. And i havent had my normal painful excruciating cramps. I havent noticed any change in discharge. But i just feel off and it makes me anxious. I have taken 2 tests in the past week but i feel like its too early to tell.. Any advice????