3 months pregnant

I was taking Duphaston tablet till my second month and doctor advised me to stop taking it. It's my third month and I get cramping pain from upper stomach to vagina at one stroke on left side. Though it occurs occasionally, the pain is intense. Earlier I was advised to sleep on my left side. But nowadays I feel comfortable on sleeping right side . Is this related to the pain? #firstbaby ##pregnancy #1stimemom #advicepls #pleasehelp