Hay and welcome ABarta!
First of all, chin up, Im here to help lol.
Now I am by no means the type of person to be giving useful information to someone who seems to be so darn active. But I will do my best.
The issue you have is since you lift, your muscel mass must be pretty high (is this what you competed doing?) And I'm sure you know that muscel weights more than fat and blah blah blah...
But by the sounds of it you seem to be doing a lot of the right things..... Now in my opinion, since you are working out the way that someone should be, I honestly think that the 1200cal a day is possibly the worst idea in the world. Your muscels need fed, YOU need fed to be able to keep up the good work. Now as an athlete you are probably used to carbing up, which is possibly something you might need to assess on whether your over carbing. But to burn off the fat you really need to be eating a high protein diet (which I'm sure you have also heard before).
A lot of the diet advice out there is actually not built for people who live pretty active lives. I am sure many dietitions feel that if your over active then you should not have weight issues.
Have you used yet one of these calorie counting apps? I'm not sure how good mine would be where you live, but I use Myfitnesspal. If you have spent a week using one of these then you might have a better idea at where you might be exceeding, carbs/protein/fat.
I personally feel if you did an 1800cal diet for a week and you saw no results at all...... then and you have kept honest to the cal counting app..... you need to see a doctor.
It might not be great advice but I hope its at least got your brain ticking.
Caireen