I had a m/c at 6 weeks on the 17jan. On the 20 my bhcg was already 11. I had sex on the 25, 28 and 30. Only 2 days later I experienced lower back aches, which I still have. This was the first symptom I noticed with my last pregnancy. As of yesterday I have breast sensitivity. Could I be pregnant? I haven't had breast sensitivity with pms or ovulation in years. Looking for experiences. I have heard some people can ovulate on day 8... Really hoping!