Terrified I might be pregnant

Hey girls so I’m 9 days late and last had unprotected sex June 27th and 22nd and i am so scared I might be pregnant. I have been using the rhythm method where you track your cycle and don’t have sex on the days your ovulating and it has worked up until now for the past 2 years. I got a test and took it 2 days ago and it came back negative but I’m afraid it’s still too early for it to be able to detect a pregnancy. Can someone please let me know if you think it was accurate or if I should wait another week to take another test? I’m restless and can’t sleep over this. I really can’t be pregnant I’m just so anxious.