Implantation spotting and cramps?

My af is due on Friday , last night 11dpo after some loving with my dh when going to the toilet there was a very slight pinkish stain. Had some cramps in the night but nothing more, this morning when going to the toilet (I had liner on) there was some spotting (brownish). I am having quite bad cramps today but no further loss apart from the odd spot (again brown).

Could this be implantation, this would be my third child if I was pregnant and on some forums they say implantation cramps can feel stronger the more pregnancies. Any advice and thoughts welcome ❤️❤️❤️