When should i start getting my wedding dress fitted?

Typically 2-3 months before your wedding is when you start alterations. Since your dress seems to need a lot of work, I’d start around 5-6 months. You don’t want to start too early, as your body could change due to many factors.

The shop I bought my dress from said 3-4 months out.

I was told 8-12 weeks for mine, but yours requires a good deal more work than mine will. I would say start at 5 months out. They will probably have a few alterations and can schedule your final fitting much closer to the wedding.