yes it is normal but if the cramps are severe consult a obgynae immediately.... good luck..
during your frist months of pregnacy it is very normal exspecialy if it is your frist pregnacy i had this also if it is your frist preg. it is just your uturs tighting and bearing down for the road ahead back pain is normal the baby may be laying on a nerve or setting on one or just there to make you un comfortable.. i am sure there is nothing for you to worrie about but if you feel like it maybe something worse you can always make apt. with your OBGYN i am sure they wil put your mind at rest.. but i hope this help you in some way..