new to pregnancy!

Leah
Hey ladies! So I'm due in January so I'm about 6 weeks right now. I was pregnant once before and miscarried at six weeks. My husband and I have been trying for a while now to get pregnant again and we are finally here. There's a couple questions I have. I do have my first appointment scheduled but it's not until the 31st. I keep having weird cramping and feeling sore like I pulled a muscle or something. That's normal right? I didn't feel anything the first time and I'm a little paranoid. 
Also does anyone else have a hard time believing they are actually pregnant and feel like they need to keep taking tests? I saw negative so many times seeing positive feels crazy!