Cramping is also normal in early pregnancy. However, I don't believe it should be worse than regular period cramping. But all your doctors can really do at this stage is watch you. They are quite right however, that if your cramping gets worse go straight away to the er.
I hope you stick around! More people will be by soon to give your there opinion as well. Hopefully, someone knows a little more than I do.
Please keep us posted with what the doctors say tomorrow.