Okay, so I have a problem, and I'm basically here to see if its something actually worth worrying about, or if I'm just overreacting.
Basically, I've had this thing for a few years now. I don't really know what to call them besides mood swings. One week I'll be fine and mostly happy, and then it will abruptly change, and I'll be extremely depressed and feeling hopeless. I can't stress how abrupt these feelings are. After a day of feeling perfectly fine, I'll wake up feeling worthless/ helpless. These feelings become extremely overwhelming, and, after a while, I'll develop this sort of empty feeling where (I can't really describe it) I'll become kinda void of emotions and become extremely tired and fatigued. Then, the next morning, it'll all be gone and I'll feel fine. But it always comes back. About 3 years ago, it was so overwhelming that I started to self-harm.
So basically, what I'm asking is if this is something I have to worry about. Is it just part of being a teenager? Am I overreacting? I want to be sure its something serious before I go speak to my parents or a counselor. I don't want to trouble them if it turns out to be something normal. Any help or advice is extremely appreciated.