Time, unfortunately. I was quite bloated at 10-13 weeks too, by 15 it had gone and I looked smaller, more or less my normal shape again. From 16 I started getting a "real" bump that is much nicer than the bloat one! Sorry you're suffering.
Currently feel the size of a hot air balloon and I'm only 10 weeks. I'm quite uncomfortable and really struggling with bloating tonight does anyone have any remedies? I've had a cup of peppermint tea which usually helps but it hasn't touched it and I've got no windeze in until I can get to the shops tomorrow.