Argh! My 10 month old has decided for the last several days that her morning nap should only last 35 minutes. In the past it's always been 1-1.25 hours. Now she wakes up at 35 minutes like clockwork.

I've tried shortening her awake time, lengthening her awake time. No matter what I do, 35 minutes.

I don't think it's because of teething or anything, because she still has a good afternoon nap (1.5-1.75 hours) and STTN 7:30-7.

Any ideas? Advice? Commiseration? Wine?