Looking for some advice...

Ok my story is long. I’m 12 weeks and am having lots of anxiety. We were pregnant with our baby girl this same time last year and also due in May. Our little Harper passed away at 34 weeks in April due to an umbilical cord accident ( I woke up one morning and didn’t feel her moving and went to the doctor). I’m trying as hard as possible to be excited but I’m just so scared. I’m so grateful to be pregnant again but I’m forever changed. How do I hold on to feelings of both missing her while also loving the new baby? How do I balance fear and excitement? Any advice is appreciated.