Bbt charting


I started taking my temperature orally each morning about 3 weeks ago but I'm having a problem taking it before I get out of bed. In the morning I have to pee really badly every time I wake up. So i have been consistently taking my temperature for yt? he last 2 weeks but I take it the second I sit down to pee. My bathroom is maybe 20 steps from my bed.

If I consistently do this, do you think it can still be accurate?