@ PokerStars... I started playing for real money at the beginning of this year @ 10NL. I worked my way up to 100NL by early April (3 months). Over the course of those three months, I profited $3000. Since early April I have been playing break even poker. What could be some reasons for this?

A few reasons I could come up with:
1) My game has changed. I have become cockey because of success and started making some (tricky moves) ie bluffing a lot more, playing more hands, trying to outplay opponent too much.

2) Opponents have gotten better.

3) Opponents have developed many notes on my play.

4) I've been on tilt ever since winning $1000 my first day @ 100NL in April just to loose it within 3 days.

Someone please help. I know these 'bad times' happen, but for three months? Can I get some suggestions?