These are some sick graphs by Red 'superuser'Gladiator.
It's good your trying to keep your achievement in perspective, as it would be a shame if your game goes to pot when that enevietable downswing happens.
I took the same route, started at 2NL, moved up to 5NL, smoked 10NL until I was nearly rolled to switch to 25NL, but then I went on a month long downswing. It knocked my confidence and it took a large chunk of my BR with it.
At the mo, I'm running even and getting volume in. I don't let losses register on the radar any more. I carry on reviewing my sessions, reading and watching training vids, and always looking to improve. Topcats statement about little mistakes is spot on.
Just take variance, losses, downswings and heaters in your stride. Don't let it tilt you. Always look to improve your game.
GL