Is this Implantation???!!!please help :-)

Long story short lol! I stopped the pill around just over a month or so ago. Had a withdrawal bleed. According to all my apps I'm on cycle day 29 ish. About 6 days ago I had a heavy surge in water discharge and we did the BD every other day a round that time. Today I wiped and had a few smudges of blood. Not bright red but not proper brown either. I checked my cervix after (dipstick) and literally nothing there and nothing since (this was around 1pm British time). Could this be implantation? I've had slight pelvic twinges for two days but no cramps or bloating etc. Nothing I usually get prior to a period. I think could be my body preparing to get AF back into the swig of things but many have suggested IB. What do you think? ????