Late Period only symptom

Period was due on Wednesday. Its Saturday now and nothing. All week I've had cramping, gas and had to poop a lot. Typical signs of my period. But no period. I have NO pregnancy symptoms but I'm basically terrified to take a test and get a positive. Can anyone talk me down? I know having unprotected sex is risky but I'm married and allergic to latex so it is what it is. I'm just not mentally prepared to see a positive test and I'm starting to panic.