How to keep smiling as you wake up in the morning?

For some reason, waking up for me is pleasurable for the past two days. This is strange since I usually don’t wake up during my phone’s alarm. And whenever I wake up, I feel unwell. It’s either I still wanted to extend my sleep or I feel like having a fever. And the reason? If there comes the time when I will find waking up at 5:30am in the morning, that would be a good reason to feel well in the waking up. But so far, waking up during these two days are the reasons for me to smile. Is it because of a cool temperature or an uninterrupted sleep? I think that would be a yes for both. So later this night, as I lay down on my bed, I will let go of anything that burdens me be it anger, heartache, unfinished work, or whatever. As my Brother said, let tomorrow worry about itself. Let go.