9.4 weeks bump

Smilie • Hello our first baby girl is on the way on the 22nd November 2015... Please be a sticky baby 👼 ✨BD to all
So am 9.4 weeks today going by my scan on Tuesday but am 10weeka tomorrow from my lMP which is fine 
But seriously how can I be so bloated I usually have a flat tummy as before I fell pregnant I lost a stone and was 9.5 now am prob 9.9 or something I feel huge. I want it to be baby bump but I'm assuming it's bloat? At almost 10w