I have a question?

Mari
Experienced mother's out there this is my first pregnancy in only 9 weeks and 4 days pregnant and I had to go to the er today because I started bleeding and having cramps the doctor says I have a threatened miscarriage haven't lost the baby and I don't want to I really want this baby my fiance is happy to see our creation but has anyone has this problem and pregnancy had been successful because I'm nervous?