I would use the first one. MAYBE the second.
You should temp as soon as you wake up, before you've gotten out of bed... before peeing... etc etc. Once you start to wake up more and do more things, your temperature will start to rise. When charting, you want to use your Basal Body Temperature and that's referring to your temperature basically while you're sleeping... but since you can't temp yourself during sleep, you temp immediately upon waking... before you've done anything.
During the middle of the day, your temperature will likely be around 98.6... if you're healthy. Your temp tends to rise during the day.
So I would likely use that first temp, MAYBE the second.
From looking at your chart... it looks like the temp drop is probably indicating that you're going to start AF. I'm not sure about an implantation dip. It might be. I'm still pretty new at this, lol, sorry.