Cramping on and off, no blood, Anyone else?

Hi ladies, I am 4w5d with my first. I am  curious to know if anyone else is experiencing pretty strong cramping besides me? It's been going on for about 5 days, worse at night I've noticed. At times it's worse then AF cramps! No blood, no discharge, just cramping. I talked to my OBGYN a few times and she keeps assuring me it's just expansion of the uterus, but really? It keeps me up at night and inhibits my daily activities. Anyone having this? I have been researching and it could be constipation, I'm going to try to treat that naturally and see if it helps, a popcorn bag helps a lot too, but please tell me I'm not the only one! I expected other PG symptoms, but not this :(