I can't say whether you have CH or not (as you note, you have some typical characteristics such as the regularity of the attacks and their location and nature, but not all of the physical symptoms), but here are a few answers to your questions. Amitryptiline (Elavil) is sometimes used to treat CH. In a 2015 study, the results were like yours -- pain reduction but not complete elimination. It might have been prescribed to you also because of the stress in your life that you mention. It's not a first-line treatment for CH, but it's not completely unusual. As you say, 15mg is a pretty low dose. You can start the D3 regimen without the blood test. Measuring D levels in the blood is part of a standard bloodwork panel, so it might show up in the tests your doctor ordered. I'm going to bet that Batch will be here soon enough to show you the simplified version of the regimen, or someone else will (or I will when I have more time). The most important abortive treatment for CH is oxygen. Between the D3 regimen and O2 -- and busting, if you choose to try that -- it's very likely that you can avoid being on any substantial medications for the rest of your life, as you fear. You should also have something, most typically injectable sumatriptan, for breakout pain if you experience that. Verapamil might help you as a preventive (D3 is better for most people, and healthier), but it takes a while (a week to 10 days, maybe) to take effect, and usually the initial dosages aren't high enough to be fully effective. I'd urge you to look over this file and pursue the links to get a pretty full sense of the treatment landscape, including the basics of busting: https://clusterbusters.org/forums/topic/6213-basic-non-busting-information/