First time mom needing advice!

I recently found out last Monday that my husband and I are gonna have a baby. I go to the doctor July 6th. Is there any advice you ladies could give a first time mom? I have had several friends who have had miscarriages and I worry about that a lot. I try not to but the thought still pops in my head from time to time. I have had mild cramping just about everyday since I found out I was pregnant, with some lower back pain as well. And extremely exhausted and tired. Is this normal? I feel like I worry too much but with this being my first child it's hard not to worry about everything. Any advice would be greatly appreciated!