It’s all too easy to refuse to go below if you are feeling seasick. Staying out it the fresh air seems to make sense, and so it does for a while, especially if you can manage to steer. In time, however, this plan can lead to exhaustion or incipient hypothermia, neither of which are much of a cure for mal-de-mer. The best place for a seasick sailor is in the bunk with the head down. Don’t take all day about getting there. Decide what you must do, then go for it.
Grab the bucket just in case, keep your gear on even if it’s wet, and crash out all standing. Throw a sleeping bag over yourself and shut your eyes. Soon you’ll be asleep and by the time your watch comes around, you may well feel up to a trick on the helm.