Please help!

So after my last pack of bc I started my current one a few days late. According to my new pack I should be starting my period today or tomorrow. I have reason to think I could be pregnant. I’ll probably wait till tomorrow to see if I start, but after that should I test or wait out my whole placebo week?

I’ve had a rough cough and I started throwing up or gagging anytime I coughed which is normal, but it’s still happening and I’ve only coughed like three times today. Also been ridiculously tired. So needless to say I’m getting in my own head lol