Implantation or period?

Hi everyone

Long story short me and my other half have been trying to conceive for about 7 months. I’m due on my period tomorrow (Friday) however on Tuesday morning I started spotting, it stopped pretty much straight away but then the same thing happened yesterday morning - starting spotting but then nothing for the rest of the day. Just now I wiped and I’ve had a bit of blood come out.

Do you think it could be my period? Or implantation? - my periods have always been quite irregular ☹️

(Also, I took a pregnancy test on Monday morning but it was negative 🤷🏻‍♀️)

Any help is appreciated ❤️