Thank you so much for all the responses!

I don't have it very often luckily (20 days per month is just torture! ). Once every few months, sometimes a year or more. Sometimes just hypersensitivity without pain (with might sound great, but isn't really either, but much better still).

No med changes that could have caused it.

It does seem to happen more often when stable. Maybe not.

Lots of water I figured out as well. I also use coffee (helps to increase nausea and I think the caffeine works as well) and cigarettes (makes it much worse few minutes later, but that helps to make the nausea worse as well, simply due to pain).

A very warm and cold shower immediately thereafter, helps me as well.

Obviously no lights or any other sensory stimulation.

Vomiting really helps, yes. But isn't always possible for me: sometimes it's just enough below just pretty much your maximum pain to not make you nauseous.

Great to hear all these solutions to make it more bearable. I will probably ask for some med just in case.

It has reminded me again of severe depression: I really find it similar (the one without pain), the hypersensitivity and feeling you suffocate (emotionally, mentally) or something, very claustrophobic.

Any of you made that association?

Edit:
Ice is a bit like nicotine for me: alleviates the pain but then...! Bit like anxiolytics/antidepressants.