Cramping 3 weeks 3 days

????
I've read that cramping, off and on and irregular and not constant is normal. You usually feel it on the one side that the egg comes from. I feel it on both sides. Years ago my doctor told me that both of my eggs "drop". Is that a possibility of twins? My grandma on my moms side is a twin and the father of this possible pregnancy has a brother and sister who are twins. My chances are even greater. Has anyone had this feeling before or those who have twins, do you remember the feeling?