I'd use the first temp. Even though it's lower than you'd prefer... the fact that you got up to use the bathroom and then had less than 4 hours of sleep before temping a second time makes the second temp unreliable.
You've already got an open circle for the temp today, so at least you'll know why it's lower than it would normally be.
I know it's a drag when things happen that interfere with temping... happens to me sometimes too, but one temp won't tip the whole apple cart, if you know what I mean.