Sharp pain in back?


Could some one help me out with this.. I’ve never gotten this pain before but last night i just had an extremely sharp pain in the middle/side of my back (I’ve included a picture for reference) it only lasted a second or 2 but it took my breath away. I didn’t think much of it because it was so quick and just happened once but just now i was laying down and it happened again!! Same spot, same sensation. I didn’t think it could be the baby because its so far back but could i be wrong? Does anyone know what this is😩 im 20w4d