Hi Lindsay!!

I'm Coley (Nikki) the host of this board!!!

You are absolutely more than welcome to come and join us!! We've got a nice little group of girls here who are fantastic at answering questions and both interpreting and stalking charts!!
As for your temp... I would put in the reading that you got, but change the time of day it was taken. This will give you an Open Circle, meaning the temp was taken outside the normal window of time. You can then check the Sleep Deprived box down below.
FF will probably say something about temps being rocky due to one or more temps being taken outside the normal time, but that's not a big deal. It happens to everyone.... you sleep in on a weekend or wake up early, life happens.
I wouldn't worry too much about it right now anyway because temps can fluctuate pretty wildly during AF... so these aren't temps that are going to mean a whole heck of a lot later on down the road.
As for rounding. NO. You do NOT want to round. If you round, 97.71 and 97.74 will look like the same thing on a chart when they clearly are not. You would see a chart that appears to be full of "flat temps" when in all actuality the temps are indeed increasing.
Welcome again and I look forward to getting to know you much better over the coming weeks!! Here's a bit of Super Concentrated Fertility Charting Baby

just to get you started!!