Pregnant with Rainbow Baby and Scared

I miscarried in late October and now - in April, pregnant again. 4 weeks along, so early. I miscarried at 6-7 weeks last time and very scared it will happen again. Doctor will be started me on some medicine to help, not sure what - something that’s common after miscarriage. This pregnancy feels different, I feel the baby. If that makes sense. Similar to how I felt when I had my first child a couple of years ago. I’m just scared and worried and feel like I could miscarry at any time. How do I deal?