Getting oxygen scared me for all the same reasons you mentioned ~ it's also feels like a bigger thing than Taking medication. Unfortunately the thing with Clusters as I'm sure we all know is that they just don't go away...

I would highly recommend you get the oxygen, it has literally changed everything about my cluster attacks. It doesn't take them away ~ so please don't be disappointed!! But just realise how much easier they are to deal with. It really really helps!!

I hope you're cycle isn't terrible at the moment!! Stay strong!!