Help? Really worried!

Alex
Just some background I have had two miscarriages previously. And today I am 13 weeks! I just traveled 16 hours to my new home but ever since I got to my new house and kinda started unpacking (not lifting anything heavy just moving around a lot) I'm paranoid about the baby. I'm having really bad side pain in the middle night when I get up and go to the bathroom, any ideas why that could be?  Also I got a fetal Doppler and I can't find the heart beat, I'm really worried can anyone put my mind at ease?