So cramping during first few wks isn't normal??

They still don't know what's up with the cramping they say it isn't normal and had me come in today (which is weird cuz I keep reading about round ligament pain and stretching of the uterus and that it IS normal??) can anyone give me any insight on this. I'm a huge worrier and I tend to think worst-case scenario and I'm working on that...but I'm still freaked out and everyone is just telling me to relax and acting like I'm a psycho so. Was hoping someone here and more understanding could help?