Threatened miscarriage at 7w2d

Went to the ER because of some bleeding and spotting and found out I had a "threatened miscarriage". They did an ultrasound to check on baby, they found the heartbeat and it was measuring exactly what it should at 7w2d and they said everything looked good. However, they did tell me that only 50% of women go on to have healthy normal pregnancies. Has anyone else had this happen? What was your outcome? I'm freaking out honestly. I'm beyond scared that I'm going to lose my baby. 😔