Hi Callie and Toby
I can sympathise completely. I've been diagnosed with a form of OCD, depression, IBS and ME/CFS which all started simultaneously. I also have severe anxiety but have always been somewhat prone to anxiety even prior to ME/CFS.
I have a hypothesis that all of these 'labels' directly stem from an ongoing neuroinflammatory state caused by an imbalance between the excitatory neurotransmitter glutamate and inhibitory GABA.
I'm the 'wired and tired' type and while there may be different types of ME/CFS (as per ADHD) I lean towards and excess of extracellular glutamate as the key problem.
What to do?
There are some common sense things you could try. Reducing dietary glutamate might help. Not just the obvious things like additives in processed foods but in less obvious food sources such as heavy meats and cooked tomatoes.
If you don't already practice meditation you might consider something like mindfulness meditation as continued meditation has apparently been shown to increase GABA levels.
The supplements suggested by crux and Caledonia may also help as, in addition to methylation issues they also help reduce the neurotoxic effects to excess glutamate.
One supplement I have found helps is n-acetylcysteine. NAC is a strong antioxidant, glutathione precursor and GABA agonist with some evidence for efficacy in the treatment of trichotillomania. I take a soluble over the counter version sold as the cold remedy 'Mucomyst'. This helps me with severe heat intolerance and can prevent PEM. I can't say if it helps with anxiety or the OCD symptoms as at the moment I only take it occasionally and its not long lasting. I believe Jarrow do a sustained release version.
Re meds I'd take a cautious approach in attempting to treat high glutamate or raise GABA. Kindling is a neuroinflammatory process that can happen with benzodiazepine use and alcohol abuse. Both benzos and alcohol raise GABA (temporarily) but during withdrawal of the drug there is a resulting glutamate 'spike' and after repeated episodes of use and withdrawal a self-perpetuating neuroinflammation develops that needs less and less stimulus to trigger it. Hence the problems of tapering off from benzos or alcohol.
One compound that interests me is Baclofen, used originally to treat muscle spasticity and recently licenced here in France to treat alcoholism via reducing the cravings and unpleasant symptoms of withdrawal. You might think that chronic alcohol abuse has little to do with ME/CFS but I feel it might actually be quite a useful model. Many alcoholics describe lifelong anxiety and this may be why they start drinking initially. Over time the constant cycle of taking a GABAergic drug and subsequent withdrawal causes kindling, neuroinflammation and excitotoxicity and oxidative stress. I suspect a similar process underlies what we call ME/CFS but without the need for alcohol to act as the catalyst.
Notably under treatment with high dose Baclofen, patients report not only no desire to drink but also that their lifelong anxiety has disappeared.
Tolerance and withdrawal issues don't appear to be as much a problem with Baclofen as with benzos perhaps because it is a GABA -B receptor agonist rather than GABA – A.
For the reasons discussed above, I would strongly caution against any unsupervised attempts to modulate glutamate or GABA (Google Baclofen pump failure in Stiff Person Syndrome for a further caution) but it may be something you could discuss with your doctor?
Here are some links to articles discussing OCD and glutamate :
A light read :
http://www.ocfoundation.org/glutamate.aspx
not so light :
http://www.google.co.uk/url?sa=t&rc...vYD4Ag&usg=AFQjCNFsEouFqTFpq-anGY30q0McgDfCew
Merry Xmas and I hope this helps a little.