
Joanna! I'm Nikki, the host of this board... we're so glad to have you!
Lots of ladies on here have sleep interruptions for various reasons, husband's work schedule, little ones needing fed or waking up sick, etc.
As a rule, yes, you want 3 consecutive hours of sleep prior to temping... However, you can always temp, adjust the time your temp was taken on FF and put something in the Notes section about the time you temped.
Conditions cannot always be perfect for temping... life happens, ya know? But even with some temps taken at "off-times", you will more than likely still be able to see your Temp Shift.
Hopefully that helps some... Welcome again and here's a bit of Baby

just to help you get started!!
I look forward to getting to know you better as you continue on your TTC journey!