Advice please!!!!

OK ladies I really need some advice. I am 15 weeks along now. And I can't shake the fact that something is wrong. Or something bad is going to happen. I lost 3 babies and I'm so scared that something bad is going to happen. Everything is good so far. Heart beat of 165 growing good. I have an anatomy scan on November 9. I'm so scared to get excited. I thought I would turn to this because I don't know to many ladies that have gone through what I have been.