I'm a few days shy of 15 weeks and I thought I'd be packing on pounds by now. I haven't gained anything except for an initial 2lbs in week 6-7, probably from being on holiday. It isn't due to nausea or vomiting because I got very lucky in that regard. I'm just not gaining despite eating. Should I be worried? I also started out on the skinny end, so I really expected to gain more than this by now. Anyone else in the same boat?