My OB said stomach sleeping is ok, until you feel uncomfortable. For me I could sleep on my stomach until about 12 weeks with twins. After 12 weeks, my uterus got too big and it wasn't comfortable anymore.
As for the cramping. Everyone is different. I didn't have much cramping. I did have round ligament pain. Like if I was standing straight up or lying down in bed, I had shooting pains when I coughed. A couple times it caught me off guard and I nearly passed out! But that was only a couple times.
Call your RE if you're concerned, but I would attribute all the cramping to hormones and stretching. Your body is working really hard right now.
As for the cramping. Everyone is different. I didn't have much cramping. I did have round ligament pain. Like if I was standing straight up or lying down in bed, I had shooting pains when I coughed. A couple times it caught me off guard and I nearly passed out! But that was only a couple times.
Call your RE if you're concerned, but I would attribute all the cramping to hormones and stretching. Your body is working really hard right now.