Hi Paul
Hang on in there Paul it does get better with longer periods between your debilitating experiences. I had a subarachnoid haemorrahage 3 years ago and like you all my tests showed no aneurysm. Only last night I experienced a very traumatic night - it started with what i felt was a severe pain at the base of my skull and was followed by extreme dizziness and nausea which was really quite worrying and like you I thought " am I having another bleed into the brain ".
Also like you I have made several trips to the doctors and two visits to casualty departments and on all these occasions after a barrage of tests I have been reassured I was not having another bleed. I have learnt that the best way to get through these episodes is to tell myself I,m ok - keep calm - and almost like meditate - concentrate on my breathing - slow everything down - tell myself to be gentle with my body.
I am much better today. I can only describe the experience as like someone washing your head from the inside. I used to get these types of experiences every month but now they are one every 6 months - still very unsettling when they occur - but getting longer between episodes.I hope this gives you some hope
Ian