Pregnancy symptoms

Last wk i got a positive pregnancy urine test and then on monday it was positive too. If it's right I'd be 5 wks 3 days along. I've prayed all is right and God will give us a healthy baby. Hopefully this is the answer. I'm concerned as I have lower back pain and hip pain too. Have been using heat packs and a really stinking heat rub.. are such symptoms normal this early? Or would it be something else?? I am going for blood test next Wednesday. I hear so much about chemical pregnancies and miscarriages I just hope and pray I dont experience that and it takes any excitement out of it. This would be our first pregnancy.