Implantation bleeding

Samantha
Started my period finished November 19th few weeks in start getting pink light spotting followed by cramping not bad mild the spotting after few days went to brown now just wiped today got pinkish spotting I'm confused to what's going on doctors no help just keep fobbing me off period due the 16th December have 4 children never had this before this been going on day 10 just wondering if anyone can help thank you