Hi rainbow,
here is an idea you probably have not considered.
We do know that vitamin D has a significant influence on the expression of 2000 genes , ( 10 % of your total ) including a great many in brain cells. Breathing is controlled by brain cells. There is a strong possibility that Vitamin D deficiency is involved in sleep apnea.
Here is a podcast from the Vitamin D council, a USA non- profit organisation that looks at Vitamin D problems.
www.vitamindcouncil.org/?powerpress_pinw=453486-podcast
Having listened to that .... and realising that your problem may be vitamin D deficiency .... I suggest that you may very well help yourself by supplementing with vitamin D. As you are in the UK , ( I assume ) , then the blood levels of vitamin D that are being mentioned in the podcast are American, so their 60 - 80 ng/ml (American) actually means 150 - 200 nmol/Litre in ( UK ) units.
IF , you think this may be of interest to you ,
then over the last few years I have posted quite a bit on Mumsnet , about Vitamin D deficiency , its' effects, how to improve it , etc etc. Just search my username .
my suggestion ,would be as follows.
1 ) Get you blood level of Vitamin D measured.
Either from your NHS doctor , who may not even agree to such a measurement , or , contact somewhere like this NHS path lab, ( Sandwell NHS Trust) where they will send you a bloodspot test kit. They do charge £28 , if the test is not doctor ordered. <a class="break-all" href="http://www.vitamindtest.org.uk/" rel="nofollow" target="_blank">www.vitamindtest.org.uk/</a>
When you have your result , ( it takes about 1 week ... so much quicker than through your doctor )
THEN
-
Supplement yourself with vitamin D , such that you have reached at least 120 - 140 nmol/L , possibly a bit more , because you are trying to cure yourself of a problem which may very likely may have been caused by Vit D deficiency.
Please get back to me , if you need any more information .
best of luck ,
BTBH