I have 4 kids, am 37.
I wasn't massively different in terms of weight/size, but felt like I'd lost who I was, if that makes sense?
I started by cleansing, toning and moisturising in the morning and evening (shamefully my routine consisted of brushing my teeth).
THEN, I took a shower or bath everyday, with smellies & decent shampoo, (good god I can't believe I'm admitting to this!) I didn't realise how much I had let things slip.
I started to get my haircut again, every 8 weeks (hadn't had it done in over a year)
I then needed to exercise, so I bought Jillian Michaels 30 day shred dvd (20 mins each day) and toned up in a month.
Lastly, I went to get my 'colours done' & this changed me significantly. I had the confidence to go shopping for a new wardrobe (hadn't bought anything other than jeans in 7 years).
I've been where you are and it is horrible
.
It took small changes for me. Going back to the way I was just wasn't possible in one go. I also had a DH who understood how/why I was unhappy, which I think was half the battle too.
I needed to change back slowly, so that the change could be permanent and something that fitted with my life.
My last hurdle was my boobs, which were ok after 4 kids, but were empty and smaller than I was after my 3rd child, so I had a boob job.
I'm not suggesting surgery and a whole lot of cash is the answer btw, just giving you my route back to myself.
It took 8 months in total & I couldn't even have begun, whilst I was still breastfeeding/cosleeping/up in the night.
hth