Implantation bleeding??

Okay so on 14 dpo I started to bleed, it was light then got kinda heavier but not really, it would slow almost to a stop then start light again, it only got kind of heavy once, the rest of the time it was light and would almost stop. It continued for four days. No cramping or anything, just bleeding, since then I've been having cravings, twinges,aversions to certain foods including chocolate and that isn't normal for me, irritable, mood swings in general,etc. My breasts also grew a lot in about a week and they're heavier to.any ideas?