Bacterial vaginitis and pregancy

I am 11 weeks pregnant and was told be the emergency room doctor that I have positive clue cells and need to see my ob/gyn. I have been told that they usually don't prescribe anything the first trimester because it harms the baby. I was also told it increases the risk of miscarriage. What are the odds that I will deliver a healthy full term baby? Will I be prescribed medication? Will this harm the baby? I am worried about this pregnancy.