What do you do when you hear a "buzz~~!!" right as you're about to fall asleep?

‌I'm just about on the verge of falling asleep,
but what do you do when you hear that "buzz!!" mosquito sound in your ear?
1. Pull the covers over your head and just sleep
2. Get up, turn the light back on, and catch the mosquito no matter what before sleeping
3. Just sleep, whether it bites or not
I used to just sleep, but
these days, I absolutely have to catch it before I sleep.