False labor?! Help!!

Brittany
I am 18 weeks tomorrow with a history of early miscarriage. Right now I am having what feels like false labor! It hurts at about a 5-6 but I still feel baby moving on the right side and most of the pain is on my left side! No blood and nothing I can time just one long terrible pain! It started after I had diarrhea and it's been about 30 mins to an hour not quite sure because since it hasn't come and gone I am not timing it oh but it hurts! I know real labor pain because I can't walk and they come in waves. This is just one long pain. Is it normal for it to be mostly on one side!? Any advice is helpful! Starting to freak out!