There is no spotting! I am worried about side effects; increased heart rate of fetus and/or mother, nausea (already nauseous), dizziness, flushing. I'm worried it's so early and since no spotting, why take such a drug to prevent miscarriage. Is miscarriage a real danger if no spotting? contractions were seen on ultrasound. All else normal. Drug was recommended by Ultrasound person who is a radiologist MD. This is in The Philippines; I don't trust the level of expertise.