I am 39 years old, and this is my first pregnancy. I've been trying for three years, and we finally did it! I'm so scared that I'm going to miscarry. I am 10 weeks, 3 days. I have all of the pregnancy symptoms: nausea/vomiting (I actually had to go to the hospital to get fluids and nausea medication this week) larger/sore breasts, shortness of breath, BUT I've also been having spotting--dark brown, on and off for 4 days. I had an ultrasound three days ago, and the baby is fine. Measurements are normal and heartbeat 167 bpm. I also had spotting at 5 wks and ultrasound showed baby was fine. At 5 wks, the spotting lasted for a couple of days and then stopped and didn't start again until several days ago. This time, however, I'm having a bit of cramping. I can't tell if the cramping is because I'm constipated or if they are menstrual-like cramps. I'm so frustrated!
How likely is it that the spotting will lead to a miscarriage given that the ultrasound showed a strong heartbeat and normal measurements, and I still have lots of pregnancy symptoms?