Being sleepy

I've been sleeping more at day, and way less and less at night, should i be worried abt this? i mean, i'm not a vampire, yet i'm sleepy during the day, sometimes i feel like sleeping as soon as i lay on my bed when i come back from school, yet, sleep avoids me at night, or i'm as tired as in the day time, maybe i'm turning into a cryptid? nah, just kidding, what should i do, internet strangers?