Think I had a chemical but not sure? Help!

A week and a half ago (a week before period was due) I was getting positive pregnancy tests. Few days later they were negative. Still negative. And no bleeding, no spotting, no period, NOTHING. I’m at least a few days late. What’s going on 😭😭😭 did anyone have this happen and have their period come within a decent time frame!? We are wanting to try again this month coming but that depends if and when my period is going to come.