Unsure period

Lillian

Today is day 29 and is the prediction day my period should start. I still haven’t started. I took a test and I’m pretty sure it’s negative, but I’m unsure. Should I just take it tomorrow morning if I still haven’t started? I’ve heard that HCG levels are way higher. I’ve also known of a lot of women who get negatives, (including me when I got pregnant and miscarried a few months ago) and then it came back positive later.