Liskey, you are doing so well. It's hard to bond with your baby, especially when you expected to fall in love straight away but you feel different to what you expect.
My sister had an emergency section and found it very hard to bond with her DS1. He is 7 now, and they couldnt be closer, but I think that it took her at least a year to bond. I remember that she found it distressing that other people held him, dressed him, changed him and fed him while she was still coming round from the anasthetic. It's understandable that you dont feel able to contemplate another pregnancy,this may change in time but right now yoou have to do what's right for you.
With regards to what you say about your body, I think this is true of many new mums. Things dont look the same and you dont want to be seen naked,I barely wanted to be seen dressed! Again, this changes over time.I had forceps deliveries with DC1 & 2, I felt that my body had let me down and felt angry that I was saggy and fat but still hadnt been able to have a 'good' birth.
Be kind to yourself, ask for help, if you dont feel comfortable with your HV ask for a different one (or ask DH to do so). You can go to a different clinic or your GP for weighing if this would be better.
Finally, my DC2 (DD1) was a scrawny, whingy baby who nearly fell off the 0.4 centile at 6 mnths and didnt put on weight for weeks at a time. I feel sad now that I wasted so much time worrying and worrying about her. I spent so much time trying to ram cream and butter down her throat when she just didnt want it. When she was about a year a different HV covered our clinic and looked
at DD crawling around and climbing the table leg. HV pointed out that not much wrong with DD if she had the energy to do that. Just a lucky little person with a fast metabolism.
I am watching my DC in the garden while on here. DD1 is 3 now, and has just climbed the willow tree in the garden. She is still whippet thin, although she has now grown into her features and is gorgeous (while I think so). I couldnt possibly love her more, yet for those months of stress all I thought about was what she weighed and what a shitty mother I must have been because she didnt put on weight. Give yourself a break, both you and your DD will get there x