TTC after 2 miscarriages

I've read many of these forums and decided it's about time to put my story into words and hopefully it may help someone else. We got pregnant in April 2008 (wasn't TTC at that time) but miscarried at 7 weeks. I was able to get pregnant again rather quickly in August 2008 but unfortunately lost that twin pregnancy at 8wks. Had many tests, laproscopy, ect but nothing found. So fast forward to the present and we've been TTC for 5 months now. I'm hoping this is the lucky month but I'm trying not to dwell on "phantom symptoms". I am only 3dpo with 28 day cycles. So far I am just extremely bloated and tired. We BD'd on all the right days but the wait just kills me! With my first pregnancy I couldn't get a positive hpt until 6 weeks but it was confirmed though a blood test. I'm hoping that doesn't happen again. It took my sister until 9 weeks to get a positive hpt, she also confirmed through a blood test, and by the time she had an ultrasound was already going into her second trimester. My mother was the same way. Is it really possible to get symptoms so early before implantation? I don't know! I've never experienced the typical sore breasts or morning sickness so maybe every pregnancy is unique. I do have slight cramping so I'm crossing my fingers!