I am scared

After 13 years of infertility, my husband and i conceived via ivf. I had my 20 week ultrasound and they found i was dilated 3cm and her sac was poking through. My cervix was 3mm. They performed an emergency cerclage. At 22 weeks 3 days i started having contractions due to an infection and i had her September 10 2018. I am starting the ivf process again and i am scared. I am scared this will happen again and i will make the wrong decision about cerclages. The specialist and my ivf doctor stated that a preventive cerclage is what i should get but what if it doesn't work; then i will lose another baby. That is all i think about , losing another baby. Holding my baby in my arms and all i could say to her was im sorry. Im sorry my body could not hold you long enough. I feel like i failed her and i dont want to go through that again.