Does this sound serious? Or normal?

[Mamaxo]

So all might in bed everytime I move and change position I've been in so much pain with my back, sides and stomach, I'm 20 weeks pregnant, does this sound normal? Or do I need to get checked?

I'd speak to your midwife, but it would depend if it feels like muscular pain or pain inside? If more muscular, are you doing daily stretches and exercises as these will really help as your body grows.