What is the best off-label sleeping pill with minimal side effects?

I was sick for a few weeks recently which is when my sleep started to suffer due to sleep anxiety. I took unisom about 6 times on and off and it was helping me sleep, although sometimes the next day I would feel horrible from the drowsiness (which for me isn't worth it). I tried Unisom last night, and it didn't work for me- I couldn't fall asleep :/ I'm desperate to be able to fall asleep again, but I'm nervous to try an off label sleeping pill...I've been taking a shot of vodka when I'm desperate to sleep, and it knocks me out, and I've been feeling refreshed the next day from it! (I don't typically drink at all unless I'm in an uncomfortable social situation, which is rare for me). I don't want to have to rely on alcohol every night, though.