I sleep so often these days.

[S0rath 0f the Black Sun]

I cannot be certain. I've been 5'10 since two years ago, so it's doubtful, but who knows? It is possible. Perhaps the strange (to say the least) thoughts/dreams are a result from too much free time :S

I don't think it's physical, since you're still a teen, you're still growing, you start capping that growth at 21-23 and your developmental "challenge" for this age group is not a major factor in what's been happening to you.

You say that you have online school and you mostly just take walks and play with your puppy? Are your activities in a schedule? Even if you say you have a flexible time, make sure to not do things how you do them. What I'm trying to say is don't be monotonous, you apparently seem to have been doing things mostly in a routine, even if you jumble your activities, you do them the same way.

Try something new or try a new method at approaching your everyday activities, listen to some new, different music, you never know what you might like. Go to a bookstore and go try a book or a set of books that you've never touched before, try an author you never read before. Hang out friends' houses, try opening up conversations with people, try meeting new people perhaps. When you drink, try something different, google a cocktail or two.