Okay so I had a miscarriage four weeks ago. I was only 7 weeks along and it passed naturally. Once the blood stopped I start waiting for my period again. 10 days ago me and my boyfriend had unprotected sex and I still haven't had my period. After we had sex I woke up feeling 'different''. Similar to last time I was pregnant. And all tests including blood tests came up negative. Last night I woke up with low abdominal pain and don't know what it could be. Implantation. Not sure what to do :( help