I've had 2 premature deliveries and a miscarriage, so I am sort of an expert when it comes to "help, I think something is wrong with my pregnancy..." I usually spot early in my pregnancy, and everytime, I am on the phone to the doctor, and am never appeased until I have seen that all is fine on an ultrasound. When you have a miscarriage, normally there is heavy, heavy bleeding, maybe even clots of tissue, and is normally accompanied by severe cramping and pains. If you have not experienced this, your doctor is probably right in saying not to worry. As your uterus grows, you do tend to "stretch" which may cause slight spotting. If it becomes heavy bleeding, then I would become very concerned. If possible, ask your doctor if you can have an in-office ultrasound. It only takes a minute, and to see a tiny flickering heartbeat on the screen makes it all worth it. Goodluck, and keep us posted!