5weeks and period type cramping?

Codie
Hi ladies. 
I'm 5 weeks today and getting period type cramping that extends to my thighs. It's only for 30 secs max around 3 times a day. Let me say that There is NO bleeding or spotting at this time. Is this normal at this stage? It's my 1st pregnancy and I'm over analysing everything!! 
 Thanks ladies!!