I agree, I wouldn't worry just yet. All the other signs are looking good and you may not be getting an accurate temp reading if you aren't sleeping very well. Can you maybe set your alarm before you start waking up, for example
10p - go to bed
3a - take your temp and continue sleeping
4a-6a - wrestless sleep
Does that make sense?

It totally does in my head! LOL
Also, my first month charting, I didn't O until CD 20! So, anything can happen, you know? Just wait out the first month to see what your body is doing. Of course, if you get a bfp this month then no worries, right?