That doesn't sound pleasant @ObsidianTree! Hopefully that is a one off.
I have gone back to 15mg and so far coping better with it ie it's no longer suppressing my appetite so much I can't eat enough to have energy.
I do burp more than normal but they aren't sulfur-y. I do feel cold but it feels like normal levels of cold rather than having the ice cold hands and feet I had in summer on 7.5mg.
@ObsidianTree if you are on your second 15mg pen what did you do about the bonus dose in the first pen? Did you take all of it in one dose or just 15mg? Mine is over 2 weeks away but right now am thinking about just taking it all in one go. But then my head says but that's probably 20mg which sounds like a massive dose.