Squidipa - I don't think implantation bleeding is 'usually' heavy, but you never know 100%

Kirby - With Elly I had significant bloating, cramping and the same kind of bleeding you describe couple of days before period due - when my period never came 'properly' I did a test and it was implantation bleeding! You will either have to do a test or play the waiting game, but very well could be implantation by the sounds of it!