Odd period

Alissa

So I thought I started my period last Friday. Light bleeding. But the rest of the weekend through today(Tuesday) there has only been discharge with a slight tint. My period was due Monday and normally my periods are super regular and there’s definitely a lot more blood!🤣🤣 I took a test and it was neg but I have no idea what’s going on. Anyone ever had anything like thins? Any ideas?