should I be worried

Caitlin
Hi ladies. 
I'm on a camping 3 weeks travelling around Tasmania and our air mattress has been going down a little over night so my body isn't straight 
This morning I have back pain on left side (which I've been feeling on and off the last couple of weeks) and cramps in my lower abdomen and left side 
First time pregnant so I'm not sure if I should be worried or not ? 
I'm 18w1d 

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