Confused-
Yep, your story sounds quite familiar to me. Pretty much everything you wrote I experienced myself but it happened a much later age. By the time it had fully hit me I was 50 years old and I had a wife and kids and a career to worry about. Just like you I had early signs but I didn't recognize them for what they were at the time.
As Amber said - doing nothing / stuffing your feelings is not the right way to handle this. Your feelings will most likely continue to intensify until you do something.
When a person has this realization therapy is usually the first step to take; a therapist can help you see things as they really are and help you cut through the confusion and get to the heart of the matter. However, I understand your circumstances prevents that. Maybe the therapist can happen later, or you can seek therapy in some way to avoid detection (I live in the U.S so I'm not familiar with the ins and outs of your country's healthcare system).
There are some things that you can still do however. Getting in better physical shape is a good one (that's one that i'm also working on right now and it's free) as well as finding out if there are any trans* support groups in your area (they are usually discreet so no worries about anyone finding out). You've ALREADY taken the best first step by joining this site! There are LOTs of people here that have been exactly where you are and have gone through the things you are experiencing so keep reading older threads to gain knowledge.
If you have a place to keep such things you can begin to pick up a few pieces for your wardrobe; thrift stores are a good place to begin improving your courage in that area - you WILL NOT be the first gender non-conforming person that they have ever seen, trust me

In my early days I remember being terrified to step foot in a thrift store for women's clothes but now I just shop wherever I want to.
This journey is a tough one no doubt. Take each day as it comes and deal with only today's problems and don't worry about tomorrow - you can worry about tomorrow's problems tomorrow. On this journey you will experience very hard things and difficulties, but you will also experience unexpected great things - one of them is gaining a much better understanding of yourself as a person. I'm catching glimpses of the "other side" and I like what I see over there. I hope to see you posting more on the board in the future!

~Eva