Cramping

Aline

Hi guys, first time mom here. Im 23 weeks pregnant and I’m experiencing some cramping for about 3 hours now. Its a burning like sensation like a when you have a urinary infection and is peing. But is not happening when I’m peeing. Its just constantly coming and going for the past couple of hours. Is i lt normal ? Should I contact my ob? No bleeding or anything so I’m don’t think going to the hospital yet