Not a Nap, but an Evening Sleep

It's something I often do on my days off, falling asleep from evening into the night. I do wake up early on holidays if I have things to do in the morning. But I get hit by sleepiness after lunch, before dinner. It's even worse if I've been drinking. I try to resist, thinking that sleeping at a weird hour will make me unable to sleep at night. But when I can't take it anymore and lie down for 'just a little bit' before 7 PM, I wake up after about an hour. I should get up then, but I'm overcome by overwhelming sleepiness and end up sleeping soundly, only to wake up around 10 PM and regret the wasted time. Yep, this happened today. I have work tomorrow, thank you. lol I shouldn't sleep in weird ways, and I definitely shouldn't be living with chronic sleep deprivation.