Patient: Why am I feeling breathless and unusual?

Symptoms: Shaking (mainly hands, often top half of body)
Breathlessness (to the point I’m taking deep breaths far too often)
Some sort of muscle spasm, parts of my body will just suddenly twitch.
My mood had changed, I’m always snapping at people for no reason and I’m just not my usual happy self anymore.
I often feel faint and feel like I have something almost blocking my throat.
Lots of small things that I don’t think are normal.
Is there an explanation for this?