You certainly owe me/us no apology. Yes, it is still seasonably warm here. And I have been wet and cold quite a few times. It can be life threatening, more so because as core temperature drops, the ability to engage in critical thinking drops. This is why victims of hypothermia have been found at the end of a trail of dropped clothing.
As I said, it seems that you are searching your memory for missteps that led to your situation. Hindsight is always better than viewing a situation when we are in it. It is my hope that you and all of us in fact, can gain some insight into those missteps so that we may avoid them in the future. This thinking leads us to examine stories in the news where bad things happen to people. Lost hikers. Falls. Animal attacks, etc.
How and when did you become wet? Shelter failure that night? Walking out through tall, wet grass? Was there a reason why you didn't consult your compass on the way in and out? And importantly, how will you change your day kit? What will you add without making it so cumbersome that you are tempted to leave it in the vehicle or at home? Some food for energy? I've never been a big fan of energy drinks and bars, but warm Jello, chocolate or othr sugary drink can give a core warming energy boost without a lot of added weight. Bullion cubes are good for a hot flavored drink. Water treatment tablets alleviate concerns of potable water. Most of this kit can go in a plastic container the size of a cigarette pack. In fact, I use mil-surp plastic decontamination kit containers and they will also hold a trioxane bar, mini-bic and a cheap, thin space blanket and a small piece of heavy duty foil for a cooking container. Tight fit, but it will pack in there.
4 1/4 x 2 3/4 x 1 3/4" hard-plastic and a few dollars ($4 +/-)