Cramps

Helen • I am 30 yrs old. Been with my partner 5yrs. He is a guitar teacher and I am a home carer. Bought our first house last year. Now have our first child. A son named Harvey born 27/10/3016
I understand cramps occur during pregnancy but I have been having constant mild cramps for about 2 weeks and I am already 9 days late. No other symtoms of pregnancy except my nipples itched for a few day about a week ago. Is this normal for first time pregnancy in the first couple of weeks? Or should I be worried and get checked for other causes?