Discharge

I was supposed to get my period yesterday and I was bleeding for an hour then stopped. Minimal blood on the pad usually only blood when I wiped after using the restroom. After changing my pad there was no blood on it after I woke up but by 12 there was about a 1 inch spot of dry brown bloody discharge. I'm not sure if this is implantation bleeding or just a super light period. I have a heavy flow and by now I'd be crying in pain from cramps but I'm nauseous and dizzy and I had back aches a few days back. Could I be pregnant or just a weird period? Is it too soon to take a test?