Post baby wedding outfit HELP!

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I'm going to a wedding next weekend (!) and am 6 weeks post-birth.

Normally a slim-ish 12 with small boobs, I like bold colours, body con style and mini skirts. I'm now a wobbly 14. My normal clothes don't fit, I have only worn leggings and t-shirts for 6 months, and to top it off I have no money.

Oh, and I'm breastfeeding.

So, PLEASE can anyone help under the following criteria:
1)breastfeedable
2) not mum frumpy
3)cheap
4)comfy
5) no a-line skirts

I really like the look of this (but neckline unsuitable for breastfeeding and they don't have my size).
www.topshop.com/en/tsuk/product/clothing-427/dresses-442/petite-knot-front-midi-dress-4789724?bi=200&ps=200

How about this? www.phase-eight.com/fcp/product/phase-eight/all-sale/kimono-sleeve-maxi-dress/203238050 You could pull the top down to feed and cover yourself with a scarf if you felt exposed. I found low cut maxi dresses v useful if needed to look smart when breastfeeding. They prob have loads more in the sale, this was just the first one I saw. Have a fun time! I took a four month old to a wedding and he slept like a log throughout the evening entertainment

Try Seraphine. The outlet prices are quite reasonable.

Thanks for the replies! Thank you so much for the idea MrsVilliers, but anything that floatly is going to make me feel very fat indeed! I'll have a look at the rest of the phase8 sale.

and thanks Twinklestar2, I will have a look there too, although not my usual style.

any other ideas? v-neck, stretchy, maybe a bit trendy (am i expecting too much!!)