Confused

cierra

Af was supposed to come yesterday and never did. I am never late, and always start in the morning of af day 1. I was up late last night with a weird cramp in my right side of my pelvic area. And woke up with morning sickness and puking. I took a test came up as a bfn. Then i went to the bathroom and there was a tinge of brown on the tp. No clumps. And i never have brown before af. Anyone else ever have this? Is it implantation or just a late period?