I'm tired and I want to just sleep to skip to the next day

Sun to Mon I just slept. Literally all of Sunday, all of Monday -- just slept and had a variety of dreams. 

I dont know why I was so fatigued, or maybe I was depressed. 

I feel like I can't avoid these bouts of sleepiness. Everytime I have a good streak of optimism, enthusiasm and productivity in life --- I fall flat on my face again being lazy, unmotivated and fatigued, where the only thing I have energy to do is nothing. 

I dont take SSRIs -- on other medications...but not sure how to get back out of these ruts. 

Tuesday was better -- I slept through half but I tried to turn the day around before the voice in my head said "you've already wasted half the day -- whats the point" by reminding myself "its how you finish in the end that matters". Even then it just felt like I dragged myself through the day and the motions. Nothing was really exciting, stimulating or enjoyable. 

I dont know what to do to get out of these ruts and back into that optimistic, productive mindset. Or at least how do I reduce the length of these gloomy periods?