Implantation or chemical?

Looks like implantation bleeding imo

It could be implantation bleeding or your womb getting ready for pregnancy by cleaning itself which usually means you get brown spotting/old blood when you wipe as your body forces it out to create a sterile environment. From experience, if it’s each time you go you’re getting the discharge across a few hours or it gets heavier and you need to wear a pad then I’d definitely contact your GP or local EPU as they can check you over and take bloods to check your HCG levels x

I bled for about 6 days and then got positive test. So could be IB