Cramping concerns

Hi everyone I've just found out I am pregnant after three years ttc! I have PCOS so was told it would be difficult to conceive so I am feeling very blessed right now!! They only thing is I am 4 weeks and 6 days and I am having cramping, could someone tell me if this is normal or should I worry? I'm a first time mum so I am so nervous and can't stop worrying myself because of these cramps :(!! They feel almost like period cramps. Thankyou very much for any help xxxx