My uterus hates me 😩

Usually, I dread starting my period, but right now, I’m super anxious for it to start. I was supposed to start my period last week, and it still hasn’t come. I was spotting a week before my expected period, and now I have no period at all. I tested negative for pregnancy twice. I kinda doubt I’m pregnant, but at the same time, the fear is there. Anyone know why this could be happening? I have an appointment coming up, but I want to know if anyone has experienced his too.