cramps @ 5w 4days

Lynsay
I posted about having cramps the other day and people told me it was fine but now it's a little more painful and focussed on my left hand side - is this still just the uterus growing or do I need to be worried? Apart from nausea earlier this week and being unbelievably tired I don't have any other symptoms and haven't had any bleeding. My mind is running circles!! Have our first scan booked for 8 weeks on the 30th Jan cos were so impatient!