hi mel
most women experience cramps especially during ealy pregnancy, its usually just evrything moving and stretching to make room, however its perfectly natural for u to be anxious and to put ur mind at rest i suggest calling either nhs direct, epu at ur hospital or ur mw if u've already been asigned one. i'm sure u have nothing to worry about but it's always best to be safe than sorry, and if it puts ur mind at rest than that can only be a good thing as worrying and stressing wont do baby much good either
xx