Baby dust or period I'm scared

Ladies please as best you can , can you guys help me. As you can see January 18 I got my period all the way thru the 21st. All the ones marked with hearts are days I had intercouse I had intercouse on the greens as well as you can see I did it Tuesday and Thursday now It's been 12 days if I count Thursday and today I'm bleeding light color bleeding I was suppose to get my period on Wednesday but I got this light bleeding today could it be Implantation bleeding ????