We all have a right to feel down, low, sad, frustrated, and angry. Sometimes there isn't one particular reason for feeling like this, and sometimes, there's no reason at all. There's no rule to say that life will be sunshine and rainbows every single day. Real life isn't like that. We have bad days, and no one should tell us to 'keep your chin up' or 'be more positive', because they haven't walked a mile in our shoes. And whilst, of course, there are people with far worse situations throughout the World, this is what is happening to us, right now, and we are allowed to feel however we want to feel about our own situations.
Saying that, it's important to know when the negativity is affecting you more than you realise. And whilst every day won't brimming with aforementioned sunshine and rainbows, it is important to take the time to look for them, no matter how much weight is pressing down on your shoulders.