Need help

Rayan

So I was due the 2nd of August and started spotting on August 29 I had brown spotting all day than two days of a flow bright red blood I only had two days than nothing everything ended I have been nauseous the whole month and cramped the whole week after ovulation.. did anyone go something like this I been testing and it’s been negative is it implantation bleeding and I do have pcos but I been having regular periods and on time