Mid cycle bleeding, help

Hi, I’m very confused with my cycle, hopefully someone can help me. The 20th of March I had like a one day period, and then two days of spotting. I thought it could be many things like early period, hormonal imbalances, implantation bleeding, or who knows what 🤷🏻‍♀️

Anyway my period was due the 28th (two days ago), but no symptoms, no bleeding... nothing. I’ve been taking tests since Saturday but all came negative. I’m fairly regular with my periods and I don’t remember missing one ever.

Any thoughts? I’m not expecting a miracle answer, just some support through this crazy TTC journey... Thanks! ✨