Girls! I woke up with left side pain in my back, sharp pain. Not const…

Girls! I woke up with left side pain in my back, sharp pain. Not constantly, but it would hurt for some time and then stop. It happened twice. Now my right side is hurting, min 15 already not letting go, stomach hard, and when I walk, my lower abdomen pulls. I'm 32 and 4 days pregnant. Could this be because of his activity?