Short pain?

so im 26 weeks pregnant and cant figure out why im having this fast sharp pain in the area i marked above. It maily happens throughout the night like of my bladdar is full it hurts especially when i stretch out. ive noticed it a few times when im sitting it hits me with the pain just fast and then gone. Now today i had it this morning twice and now its just kinda lingering? Has anyone experienced this or know anyone that has?? I plan on calling my doctor tomorrow and going in and getting it checked but just wanted some insight first.