250 is a little low. I'm a big believer and get the most from the least but you might get more shutdown than you bargain for without any benefit at that dose. Bump It Up to 300 or 350 a week.
In for stats.
OP; 5KG of muscle does't happen in ONE cycle and losing fat comes from diet & cardio. Make sure you understand how steroids work before using them.
You're running a shit ton of juice and the DECA hasn't cleared your body before you started the tren.
I'm surprised it took you this long to feel a lump.