2 weeks to get into bridesmaids dress!

Erin
I'm so worried!
I'm MOH in a wedding in two weeks. I'm going to be 2 weeks post partum tomorrow. I bought the dress before I knew I was pregnant. Of course it doesn't fit anymore. I traded for one size up w another bm and it STILL doesn't fit 😫
Part of the prob is I'm nursing and my boobs are enormous. But the dress is no longer in stock at all so I can't exchange it either. 
I'm embarrassed to say I gained 46 lbs during my pregnancy. I've lost 23 lbs so far. 
Any advice?! Tips tricks? I'm not sure if altering will work if it's too small? I have no idea how to gage how much more weight I'll lose between now and then. Sort of stressed out :(

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