I believe that you can still get preg symptoms after a miscarriage, although I have never had one. I have a close friend who recently opted for a termination and they told her then that it would be a couple of weeks before she felt normal again and chances were she would still feel symptoms of pregnancy.

If it's a suspected mc though I wonder - did you take a test that came up positive and have started bleeding and cramping??

ETA: Just found your other thread........ others have said the same thing you may have gone in there too early and it really does need to be an internal ultrasound at that early stage as well.