Okay So My Period Started 12-17-17 It Stopped 12-23-17 I

Okay so my period started 12-17-17 it stopped 12-23-17 I had intercourse during period on 12-19-17 & after on 12-28-17..I've started spotting on 12-30-17 & still it remains as very light spotting only appears when I wipe & is either light pink or dark Brown just today it's been dark Brown on 2-1-17..so I guess what I'm asking is, is this implantation bleeding even tho it's only been a week or 2 since period I never bleed in between periods so I doubt it's ovulation bleeding ..do you think this is more likely to be implantation bleeding & what should I continue to look out for if I am