Undecided Question

Dry and oily skin! help!?

my skin is normal-oily during the day..
i use makeup, sometimes it's really hot in school, i don't usually sweat

but today i was just hanging around the house(i did the same skin care routine)
and by the afternoon my face was really dry. there's skin flaking in places around my cheeks!

tips? ohh and i have acne prone skin :( i just use nightcream on the lower part or my face