Girls, please tell me, I'm 25 weeks pregnant, we were walking, came ho…

Girls, please tell me, I'm 25 weeks pregnant, we were walking, came home and I was watching a movie and in the lower part of my right side started to sting my belly, gradually it would be painful then pass, or it would start to hurt sharply and then pass, it's scary, I have never had such pain during pregnancy, what could it be? Everything was fine.