Getting past fear!

Hello! I'm Jessica and pregnant with my first, 4w4d. I have gone through quite a bit to get pregnant over the course of 3 years. We just had a consultation to start ivf. Little did we know I was pregnant from an iui while sitting there preparing myself for the next step. I am over the moon excited and shocked but terrified something will happen and I will go back to feeling hopeless like I have for the past 3 years. How do you ladies cope with your fears?