I'm 32 weeks and I had cramping at the beginning and still do every now and then. It's the uterus stretching and round ligament pains which are normal. If it gets really intense and/or you start bleeding then call your doctor ASAP.
Cramping is normal. Your uterus is stretching a good bit, also gas can cause it. I'm 15 weeks and mine is just getting better.
Im still a little crampy at 15 weeks. Its annoying but i dont think its anything to worry about. Theres a lot going on down there :p
Cramping a little is normal! If it gets worse like you can't stand it or your bleeding then worry.