Hi Little Piggy, welcome to the group!
IT's great you have found ways to manage this. The Prednisone taper with Verapamil ramping up simultaneously is from what I have read the first line of combat lots of neurologists use. I glad it got your headaches under control.
We have a very similar story. I too had attacks 5 years ago but as I recall only when I drank for a period of about 2 months. I just stayed away for a while and one day I tried some beers and no problem. I had at the same time gotten glasses, and attributed the whole thing to eye strain! Anyway they just came back a few weeks ago hitting at all times regardless, searching the web myself I found these headaches matched CH almost exactly. The only difference was I had not had a cycle like this one before as most people have had many cycles by my age.
First off, everyone here has been urging me to see a neurologist as well, and I have also done a log, and am waiting to get in with one ASAP. In the meantime I have gotten some great advice here, and tools to combat this, they have helped me get through this cycle, thank goodness!
In my "Thank you CH.com" post on this board yesterday I told about my experience with the anti-inflammatory vitamin regimen. But you can read it and look at the poll of CS suffers which was conducted here and see what you think for yourself. Multimedia File Viewing and Clickable Links are available for Registered Members only!! You need to

or

If you were thinking of building up you D3 please ask the group if it might be best after you get back off your verapamil.
Maybe now you have it handled this time but next time I recommend Oxygen. I wish I had done it sooner but I was just learning and a tank of O2 in the house seemed like a drastic thing to do, it made me uncomfortable to think of breathing O2 in front of my wife and worry her. Silly. I got it and used a 30/30 room air hyperventilation method I learned about here which saves on O2 and I can attest it's the best way to abort. (cheapest, healthiest) I do use the sumatriptan pen if I get woke up with a severe night hit though!
Hopefully this is the last cycle you ever have. But by looking into D3 and O2 you might arm yourself better if there is a next time, and possibly (as evidence shows) if we can keep our D3 levels good we can possibly reduce or avoid the attacks in the future.
To me, 30 cents a day worth of vitamins... I call that cheap insurance!