Your symptoms will fluctuate and it does not indicate a miscarriage will occur. ;-) With my 2nd daughter I would go weeks on end without tender breasts.
Around 7 weeks pregnant I lost all my symptoms and started spotting so I immediately thought I was going to miscarry. I didnt, and my symptoms came back with a vengeance around 9 weeks pregnant. I was then sick until well after 16 weeks or so. When I was going through this I tried to figure it out too, but it's kind of a waiting game as symptom wise pregnancy is sooo different for every woman and every pregnancy. Good luck though!!