Currently 12 weeks pregnant with my third. Last 24 hrs had quite centralised discomfort across my stomach.. not awful but noticeable. It comes with waves of nausea and also am feeling discomfort in my side towards my back at times, but that's only occasional. I also just feel so drained, like walking and standing up feel like a chore. Never experienced anything similar with my other two so whether it's best to get it checked or it could just be things stretching out.