Hmm so I don't think I had the cold after all, I think I was going through a caffeine withdrawal - built up far too much of a tolerance and wasn't flushing it out of my system properly all these weeks, hence constantly feeling tired (and then trying to drink more to keep myself going).

After a full day of hell with the headaches, nausea and not getting out of bed, I feel heaps better - woke up clear-headed, without feeling lethargic (haven't felt that way in a while), naturally got out of bed at 8am, put away my dishes and having a light breakfast with a SMALL amount of coffee.

I can't wait to finish this thing so I can properly investigate dialling down my caffiene intake altogether, maybe switch back to green tea like I did years ago.