If you struggle to get, or stay, asleep, you might wonder what’s “normal” and what’s genuinely worth worrying about. The NHS says “A few sleepless nights are usually nothing to worry about, but it can become an issue if a lack of sleep starts to affect your daily life.” But where exactly is that line meant to be drawn? Well, according to healthcare provider Mayo Clinic, noticing one dangerous tendency during the day (rather than at night) can be a giveaway. Which is? If you’re finding yourself nodding off during important moments of your day, it’s possible you have a sleep disorder, Mayo Clinic says. “Being very sleepy during the daytime” is a common sign, they write.“You may fall asleep at times that aren’t typ