First month charting and I have questions!

1) is it possible for your temps to rise for several days and then drop back down to the pre ovulation levels? Does this mean I haven't ovulated yet and the spike was just a weird occurance? Or could I have ovulated around cd12? Unfortunately I wasn't able to take my temps between cd13 and cd15, but since cd15, I'm back down to low temps again. I'm assuming there's the possibility that ovulation will be late, but I've been tracking my periods for years and they are quite regular (29 days average).

2) I take my temperature at 6am everyday (silent alarm on my fitbit). However, almost every day around 4:30 or 5, I have to get up to go the washroom. I fall right back asleep and it's normally pretty consistent. Is this impacting my temperatures? 

Thank you! 

ETA: I'm still getting used to checking cm so that is not a reliable piece of information on my chart this month.