worried- advice please

Ashleigh
For the last week or so I've had intense tightening of my lower abdomen, feels a little uncomfortable when it does it but not painful. However since yesterday morning I've had this horrible sharp pain in my right side of my tummy and my whole uterus feels rock hard. The sharp pain is constant which is making me think it's not just ligament pain!
I'm 22 weeks pregnant and already any MW twice with it last week and she said it's just everything stretching and I'm fine. 
Just wondering if anyone thinks I should demand to be seen as I can barely walk for the pain, I feel like I have to hunch over to feel comfortable! Or am I over worrying? Anyone experience anything similar? X