Girls, something like cramps in the lower abdomen, sharp, sometimes ap…

Girls, something like cramps in the lower abdomen, sharp, sometimes appear. Does it happen to you during pregnancy? I understand that the back can hurt or legs swell. But as I got off the bus, it started to sting below the belly button, stood up for a while, let go a little, ate until I reached home, inserted a candle, Papaverin, seemed to get a bit better. Now I'm lying down, thinking maybe this could have been hurting and why.