Thanks for the the resale oxygen advice. I've been denied by my insurance and cannot ever seem to buy anything out-of-pocket like other people here. I used to be lucky enough to rely on triptans which I had a great supply of, but toward the end of my cycle last year I seem to have developed a bad reaction to them (trouble swallowing, increased heartbeat and all of the other call 911 style contraindications you read about in the small print).
Cycle started again like clock-work and I'm excited to see if Oxygen can help out.