I'm 7 weeks pregnant, I've felt a bit crampy all day today, light cramps in my lower back and around the front, lots of little twinges but there's also a constant pressure feeling in my uterus. I'm a bit worried it could be the start of a miscarriage? I think I'm making myself more anxious as with my last pregnancy I had HG and was very sick and so far in this one apart from the sore boobs I feel fine.