Hi Cass
What part of Australia are you in? I live in Central Western NSW and had an aneurysm clipped successfully in 2004. Pretty lousy deal leaving you hanging with this scary diagnosis and no tools or information to deal with it.
The good news is, that there is most likely a surgical option (like clipping or coiling with titanium coils) available to repair and/or strengthen your aneurysms. You will need to be guided by what your specialists tell you. The repair options depend on the the type of aneurysm, their size and location, and your age and general health.
The best advice I can give you, is to try and stay calm - yeah, sure - easy for me to say. Don't do anything that will cause physical stress or strain, remember that you have found it before it has really found you. That is a good thing.

Ummmm - this is a delcate topic, but codeine can cause you to become constipated - and straining is
not a good thing for you to be doing. So make sure that you keep your fluids up, and eat lots of fibre rich food.
Take care of yourself and be hopeful - you are certainly not alone and this is a good place to come for support.
Regards
Lyn