Would it be okay if I took Nyquil to help me sleep?

im not sick or anything, but i really need to get some sleep because i need to wake up early tomorrow. my schedule has been so bad, i usually cant sleep until around 5am and then i wake up at around 4pm. i tried pulling an all nighter once but than i just pass out at around 8am and dont wake up until around dinner time! its really become an issue and i just want my sleeping schedule to be back on track. so would it be okay if i took nyquil to help me sleep? i took it two nights ago, but I SWEAR this is the last time im taking it. i just need to wake up tomorrow. SOOO YEAH PLEASE ANSWER