That sounds a real interesting way to play the guitar Alex, you may even start a new trend <img src="images/smiley_icons/icon_lol.gif" border=0 alt="Laughing">
Seriously though there are two things that come to my mind. One is to build the strenght in your left hand (that does not mean that you only drink pints left handed) you use a tennis ball and constantly squeeze and relax for a few minutes, two or three times a day.
The other thing is. Has your guitar been 'set up'? If the strings are too far from the fretboard it will be more difficult to hold down barre chords. An experienced friend or your local guitar shop may be able to advise you whether that is the case or not. But be wary as to who sets it up for you as it is possible for a guitar to be ruined in the wrong hands.
Hopefully Bootlegger, or someone more experienced in 'setting up' can pick this up and advise you further.
Roger
"Do, or do not; there is no try"