I'm sorry to hear that I hope your feeling better. I have never heard of a broken nose causing a mc. I think the best person to ask would be your dr or you could post up your question to the ask a dr forum. I had bleeding with all my kids it's common especially in the first trimester. I would continue to have your hcg levels monitored and have a u/s. It may be too early to see the baby you may have to have a repeat u/s. Try to rest and relax as much as possible and stay well hydrated it's crucial especially when you are bleediing. Take care I'm here if you need to talk. Best wishes to you and your baby!
have you seen a doctor? you should go straight away? bleeding in pregnancy is not a good sign, you can miscarry if you lose so much blood as baby will get not nutrition it needs, i had no bleeding in my 2 pregnancies, you should see a midwife