Please put my mind to ease can't stop stressing !!!!

My Ex boyfriend and I have been broken up for 6 months now but we still meet up for sex occasionally. We met up about 2 weeks ago and had unprotected sex and now I'm 6 days late although this has happened before when we were still dating it's took a whole week for my period to come but I was getting the cramps and boob aches, now I don't feel anything but I'm just so tired, hungry and stressed I don't know what to do ??? when to take the test ??? Should I wait a few more days?? Do I tell him ?? How do I tell him ??😭😭