Waking up with terrible pains

[My2boysaremyworld]

Just wondering if anybody has an idea on what's happening to me. I will contact my midwife tomorrow and hopefully hear back off her.
For quite a few weeks now Iv been waking up with back and tummy pains. The pain is so intense and lasts for about 15 minutes. The only way I can describe it is like a constant contraction pain that I have no break from. I have to breathe the pain out and it eventually eases off. Iv had it twice this week and it's only ever in the night. Google says maybe grabbed gas etc but it really doesn't feel like that or constipation. I'm good with pain but this reduces me to tears cuz it just doesn't let off at all.