scared very scared

I'm 15 weeks pregnant with my rainbow baby I lost my daughter at 6 months on March /22/16 it took my husband nd I 4 years to get pregnant with are second now to find out we are pregnant with are third is unbelievable. I found out i was pregnant again July/21/16 at 5 weeks I'm so scared something will go wrong with this pregnancy cause of what I went through with my last one I pray everyday nothing will go wrong nd my son is healthy. When you loose a child it takes a piece of you that you just can't get back I'm trying so hard to stay strong to not worry but I find my self so scared God will take my son. I have a fibroid tumor on my left side I've had 3 ultrasound so far one at 5 weeks, 2 at 13 weeks each had good results from what they said but in the back of my mind I'm waiting for someone to tell me something bad like before. I'm due March /24/17 I gave birth to my daughter march /22/16 the dates are crazy to me as well like wow I wonder what was god plans in that. I have one living daughter who is 5. I just need some advice from mothers who know what I'm going through. Thank you for reading nd your comments.