Not knocking how you felt but I thought a wetsuit kept you warm . When I was young I did a 7 mile swim along the Thames in aid of charity with a diving club I belonged to in February. Admittedly I was suited up with a hood as well but I don't remember being that cold when I finished but then I was in the water you on the other had were standing on it so to speak with the wind howling around you. I know how you felt