Setback due to laziness?

So it just seems as though my hair has not retained any length since my last length check in September 2012!  My goal was to reach BSL this year, so that's not been going so well.  I did have a good trim of about 2-3 inches in January 2013 as I thought that my ends looked horrible and I thought that a good trim would change that.  I was wrong.  My hair is still brittle, it is still breaking and it feels as though it is shedding more than normal.  I am at a loss as to what to do to fix it.  I think that my relaxers will have to happen every 2-3 months and no less, otherwise the breakage just gets out of hand.  Also, I think I am going to revert back to what I was doing at the start of my hair journey.  I would wash my hair twice a week, wear protective styles all the time, airdry my hair all the time and moisturise and seal twice a day.  That seemed to work in the beginning, so I will go back to that.  TBH, I have been a bit lazy in the last year or so - not covering my head at night, (althogh I do have a satin pillow case), not moisturising and sealing, and only washing once a week.

I tried a flat twist high bun as a protective style recently, so here's a pic of the look.  I am planning to relax in a couple of weeks, and I'll check back in then