Well, when i was younger and i was at my goal weight and was at my fittist, i still felt fat. When i put on weight i felt the same, so no matter what i was weight wise i just compared myself to others and thus saw myself as a fatty.
Whats changed now is that i appreciate myself a lot more. I know i have a long way to go but i just think as the days go on how happy i am to be loosing weight and being able to do all the things i couldnt do before.
Yes you may have body image issues because of how you feel inside but others dont look at you in the same way you look at yourself.
This may sound harsh but sometimes you got to pick yourself up, dust yourself off and get on with life and feel less sorry for yourself. You have done amazing getting 50kgs off just keep it going and be more positive. Waking up everyday, tell yourself to be positive and get out there and live life to the full.
I have felt the same since i was a kid until i changed my view and lifestyle so that i can always be positive, even when things are not going well you just have to get on with it. There are opions for your stomach but tbh your issues sound like they are mixed around self confidence and feeling sorry for yourself.
There are a lot of people far worse off than us and i count my blessings that weight loss is my only problem at this time in my life.