No. Or at least probably not. For Batch (username now xxx), I think he found that the full D3 regimen had pretty much eliminated his CH attacks, and when they came back he found that Benadryl eliminated them again (that's how I remember it). So in the right circumstances the answer might be "yes," but I don't think you have reached that state yet (and, frankly, I don't think most people ever do). For now, I would say you will know if it works if your attacks are less severe or maybe less frequent, or both.
It sounds like you don't have oxygen. If I'm right about that, you really want getting O2 to be your main priority. You might want to read this: https://clusterbusters.org/forums/topic/6213-basic-non-busting-information/