Hi,
i just went through the same symptoms. My husband and I have been trying for 7 months. We finally got pregnant. Early on I had some wierd crampy feelings on my left side. I went to my obgyn and had an internal ultrasound. I was measuring about 6 weeks 1 day. We saw the heartbeat. About 1 week and 3 days later I had some light spotting. Light pink blood. After contacting my dr, they did another ultrasound and found that the baby had stopped growing at 6 weeks 1 day and there was no heartbeat. I am heart broken. I didn't still feel the signs of being pregnant for the past week. Maybe this will help. But not always is it the signs of a miscarriage. Good luck to you!