Jen I do feel for you but please do not be scared as it is good they found it.
Just because it is there it does not automatically means it needs to be treated. Chance is it only needs monitoring. And if they do need to do a coil at least you know it is done and no fear that it will burst unexpectedly.
I have 2 brain aneurysams. They have been found by accident some 17 years ago. I also had scans at the time but sizewise they were nit deemed high risk so all I do is monitor them. I have scans every 2 years and if they get to the size where thhey need coils we will do it.
I had angiograms done back then (now just MRIs) and angiogram is painless. They just have you lie on the table and you feel nothing of the wire they insert. You will get a little bit of weird taste in your mouth when they release the dye but that is as bad as it gets.
Trully there is nothing to fear when it comes to the procedure. And even if they were to clip it it would be done at the same time. It does not feel particularly invasive and time goes quickly.
I would strongly suggest you investigate why you get them. I have a condition called HHT which causes them as this condition affects the blood vessels and alsobcauses various internal and skin bleeds. Aneurysm does not come about on its own so if yiu push a bit further to get to the bottom of why you git the 2 it will help you manage your health and avoid risks of bleeds both as far as medicine consumption goes and as far as medical procedures go.
I remeber being scared when I was initially diagnosed but now I see it for what it is - an absolute blessing as since know I have them we can manage them and it had given me the strength and power to demand some medical procedures be done in a way that reduced the risk of them rupturing.
Had I not known over the years I may have consumed blood thinners and had them rupture or would have submitted to medical procedures that would cause them to rupture.
This way - I have control and peace of mind. I know initially there is nervousness and some fretting over a "ticking time bomb" but it really is not that bad - I promisse. Mine have been diagnosed 17 years ago and no issues.
I wish you all the best for the procedure and will benthinking off you. I do hope you get to sleep more oeacefully knowing that medicine has advanced in leaps and bounds and knowing the littlenguy is there means now you need not fear an unexpected bleed as this gives you back the control over your health - and no bad surprises...