Pregnant

I had sex unprotected for like 5 mins last Tuesday it was the first day of my fertile window before he did it I played with it to get hard so could the pre cum already come out? He pulled out way way before he was even close to cumming. My period starts in 11 days and I’m stressed I have a feeling like somethings stuck in my throat and I was constipated for 2 days other than that I’m feeling fine do you think I’m ok and should stop stressing. Is it to early to take a test to calm my nerves?