4w6d pregnant and spotting

Nia

I am 4w6d pregnant and I just want to the bathroom and saw brown spotting and red spotting in my panties liners . I think it is implantation spotting or my uterus scratching. But when I wipe there is not there on the tissue it was just in my panties liner. What do you think it is ? The last time I spotted was when I just found out that I am pregnant with the implantation spotting.