Maybe you should try just going a night without waking yourself up in the middle. Maybe you kind of got your brain in a pattern of waking up in the middle of the night, which somehow hinders your dream recall (you never know). What sometimes works for me is really relaxing when I'm trying to go to sleep. Like not just shutting your eyes and just drifting off, but consciously relaxing yourself. I did that the other night and the next morning I woke up once and remembered a huge epic dream (4 frickin pages in the DJ), went back to bed then woke up again and remembered another big long dream (shorter but with a better story).

It was amazing then but didn't work too well last night. I think it's best to shake things up, keep your brain guessing. Good Luck!