2 months then boom!

So where have I been?
Actually nowhere, no dark places, no hiding, just almost good old me.
For the last 2 months I have been feeling better than ever, getting some exercise, socialising, facing issues head on. If I am brutally honest there has been an underlying issue to getting simple tasks gone! which I have allowed to mount up, but I have not ben laying awake at night fretting.
Then today, boom, total melt down. Terrified to do anything from Answer the phone trying to do the simplest of things. It all just seems out of reach. Impossible to achieve, none of which are but try convincing myself of that is impossible. I just don’t get it, head is spinning, chest pounding, short of breath, but nothing has happened to cause this. I just want to hide in the corner and for everyone to leave me alone and whats worse is I can’t see an end to it, I don’t know what will make it change back again, I just know it will, at least I hope it does.