So I had started my period 3 days early, very light, and scanty, only filled two light tampons and only lasted two days. My period is normally every 27 days like clockwork and lasts for 4-5 days and very heavy filling 4-5 super tampons/day. Now three days after bleeding stopped, my breasts are very swollen and tender, my appetite is odd, and having back aches, nausea, headaches, and fatigue. So my question is could this have been implantation bleeding and I could be pregnant?