Odds that i will have a 3rd miscarriage?

I found out that I am pregnant this morning. I am currently 3w4d. Before this I miscarried twice in the last 4 months both around 4 1/2 weeks. I want to be excited about this pregnancy but I am so scared I am going to miscarry again. Does anyone have any success stories about having a healthy pregnancy after multiple miscarriages?