so stressed out!

Hi everyone, I  currently pregnant for the 3rd time. The first time
I miscarried at 10 weeks and last time at 12. I'm only 5-6 weeks now. But every time I feel an ache or crappy I'm sooo nervous. On top of it I'm not sleeping good due to worry. Any tips to help with nerves? My appointment is Friday and I just feel it's taking forever to get here