What does your BBT chart look like?

A
I'm curious to know what everyone else's bbt chart looks like.
my chart is all over the place and fluctuates a lot, which is making it hard to pinpoint the day in my cycle I've ovulated on. 
I take my temp at the exact same time every morning, before I've even moved my body to get out of bed and after a full nights sleep. 
The top picture is my chart for my last cycle and the bottom picture is my chart for this cycle. I've no idea if this is normal.