3 months pp, 4 months until the wedding

I gained 50 pounds during pregnancy, and i’ve lost 32 so far. I’m getting married labor day weekend and i really want to drop those last 18 pounds- my alterations appointment is June 1st. My biggest challenge is that i’m breastfeeding so i can’t cut calories.

Anyone have any ideas? My dress shows my arms and i really want to be comfortable with myself by my wedding night.

Here’s a picture of my dress (mostly because i’m excited)