Advice please? Starting body building again

Hi ladies wanted some advice!! I used to do a lot of weight training in my mid-late twenties and before I had children!! My physique was getting very good and I was thinking of entering a body building comp!! Then 25 I had my first child!! I snapped back into shape after very easily!! And actually had lower body fat than before my daughter!!
Five years later and still training I met my hubby had another bubba and now I hate my body!! I actually work in the fitness industry but I think I now look fat!! Have lots of body fat!! Look and feel tired all the time and I feel I don't "look like an instructor" I'm now approaching 32 and I'm wondering if it's too late to reclaim that figure I once had??? My tummy I hate the most and always cover up now infrint if my husband!! My confidence is shot to pieces now!!! When I do try to train at work I get stared at by my colleagues!!! Laughed at!! And quizzed about what I'm doing!!! So I eventually loose confidence again and give up!! I get to "just stick to teaching classes!!! That's all you do" I really want to look how I used to look or at least a big improvement!!! I really admire Jodie Marsh at the moment!!! I think she looks fab!!! I feel like I want to do this,look amazing and prove everyone wrong!!! Show them how I can look!!!! Feel amazing again!!! As part of my job I have to teach classes!!! So I was wondering if I could incorporate this into my training??? I do two spin classes (very Hugh intensity cardio)

I don't know anything about spin classes and all that but the first thing I'd do if I were you is tell these colleagues of yours to STFU!! 
 
It's never to late to improve the way you look and feel about yourself - I think if you've been in shape before it can be a double edged sword as on one hand you already have the tools and the knowledge to create a an excellent physique but on the other hand having looked great in the past it can seem daunting and a long journey to get back to where you want. 
However I think once you've broken through the first month of returning to serious training and you get back in to the swing of things the rest will come naturally - it wont be easy but you'll see results using techniques you've used in the past and your confidence will shoot up. I'd just totally ignore what negative people have to say, they aren't worth listening to and do this for yourself, not to prove them wrong because they aren't worth the effort :)