oh if we could answer that question... once you've sleep trained, the teething monster breaks your night, then it's potty training, then it's nightmares, and it goes on and on till they're teens and want to hang out with friends... i guess we'll sleep through again when they're off to college!...
sorry, don't mean to put you down. I found 13 months to be a particular tough time in sleeping. Ds was a great sleeper once he was trained (i had horrible times with naps) and we enjoyed the bliss from 6 months till he was 13 months old. We then started having problems with night wakings and very early mornings and it took me long to realize it was teething pain, until i ended up at Er one evening because he was screaming bloody murder and the er ped told me he was getting ALL his molars at once. Poor thing. Signs were confusing, he didn't seem to be in pain at nights and on early mornings he seemed ready to start the day.
Why don't you try some pain aid and relaxed and LOOOng night routine for a start and see if that does the trick for you? I discovered i had to use the pain aid on a dialy basis as a prevention because if i waited till he woke at night, then it would be useless.
HTH, hang in there!