HELP I'M CONFUSED

Lydia • FTM baby born 10/04/18 ❤👶❤

So I was supposed to start my period 3 days ago. I had dead blood (which is normal for me) but it lasted a day longer than usual. Now I have no blood whatsoever. I had been tested for pregnancy on Tuesday 1/2 (5 days ago) and it came back negative. I'm confused...