I think most of us experience a sudden and dramatic crash after 4 - 6 months post break-up so in that respect: you're perfectly healthy!
It seems to my mind, that we run out of adrenaline at that point and cold hard reality kicks in.
The first year is a year of 'firsts'. There's lots of significant dates to get through (I'm talking calender events not assessing potential new significant others!).
And then, of course, it's bloody Christmas where all the films are 'feel good', the adverts stress family 'fun', blahdy, blahdy, blah. For some of us, this time of the year exemplifies just out unstereotypical we are. Reminds us that there's something out there apparently 'normal' (is it fuck...but hey let's suspect belief because it's on the telly).
So, it's absolutely no bloody wonder you're feeling pretty shit right now.
I can tell you that in one year's time from now - you will feel differently. Whether you're feeling on top of the world I cannot say. I can say, that it will never be like this again.
Like you I'm AD averse - for my own personal reasons. I do not, however, believe they should be ruled out - for some they are a really good option and a very good decision.
However, I do firmly believe in counselling. If you've not considered that - have a think about it. Sometimes just verbalising stuff is all the tonic you need.
And yes, if you can afford a cleaner - get one. Just having more time to enjoy yourself free from chores/drugery will make an enormous difference to your day to day.
And finally, once we're all through January, the days will start getting longer, the months shorter, and the time passing.
I hope this makes a modicum of difference.