Quick question 12dpo?...?

Hey ladies i have a quick question and im 12 dpo. Now i heard that after ovulation if you bbt drops that means af is coming soon. Well yesterday i checked and it was 98.19. My question is this morning i checked it and it was like 98.33. The problem is i forgot that i sat up to turn off my alarm then went back to sleep and checked it when i woke back up. I didnt get outta bed or anything but what do you guys think do you think that tainted my temp today???