Second trimester losses.. seeking encouragement

I’m currently pregnant after three miscarriages two babies at 17 weeks different years and one only at 6 weeks. I’m currently pregnant and will be 16 weeks Monday and I’m terrified of the 17 week mark.. has anyone had any success stories? They don’t know why it happened nd I never got answers but all I want is my baby and it’s very hard right now. I feel alone.