Hey fiftyamp,
in response to your question about becoming chronic, with the start of a new cycle preceding one just finished, I feel your anxiety and pain. This is something that happened to me for 5 consecutive years, in the fifth year I 3peated my cycles. I was at a loss, didn't know what to do. I found this community of knowledgeable and caring people. Through much trial and error(and pain) I managed to limit my cycle in that sixth year to just once and go from 16 weeks to 11.
The one thing I've learned about CH is that what happens in your past cycles does not always hold true for future cycles. As many here will tell you, things change, meds stop working, time of hits change, quality and quantity of hits change, its a real bitch.
Don't throw in the towel about becoming chronic, remind yourself that in just a few weeks it could be over. If you have kept your vitamin M frozen, I what use them. If it has not already been mentioned, you can order LSA seeds, same concept as vit M without the trip.
Hang tough