Does anyone go through phases?

It happens to everyone, however there is generally a reason for it, eg. one might feel anxious due to impending exams, or lighthearted because you're in love, etc.

I said lightheaded I don't really have any stressors it just happens anyway

Everyone has stressors, however you may not actually be aware of them. There's plenty of stuff happening in your subconscious that recognise and deal with stuff that you are experiencing, but not in such an explicit way as your conscious mind, hence you're not totally aware of them. Anyhows, don't worry about it - everyone goes through periods of feeling happy, sad, etc.

Well, you're constantly thinking about your future - that will undoubtedly make you feel some emotions, either positive or negative depending on your outlook and your own aspirations and schemas regarding the world. Of course there are external factors affecting you - your world is not a bubble, even if you don't realise it. Anyhows, I'm off to bed. Hope you feel better that there's nothing wrong with you, as this happens to everyone.

i'm going through one now, but like AI said its due to stress etc. one day i'll feel brilliant but on another i feel bogged down by everything! so its not just you

i tend to have panic attacks and get nervous. today i was a mardy so and so, and even my dad noticed

when im in a funny mood i lose my appetite, which is annoying cos now i'm starving

Of like feeling down/lightheaded/unwell/anxious for a few weeks then going back to normal for the next few weeks and so on..? Or just me?