Yes, I used to get shivering attacks like you described often with heavy sweating too. I had to put on sweat paints & hoodie and be under several blankets and 2 comforters. Once when I was visiting my friend abroad in college, I had to sleep in between two space heaters (borrowed from the library), all the blankets my friend had, and slept wearing jeans, two socks, down jacket, and gloves. My friend was a good friend to have slept in that tiny dorm room I made into an oven.
I can only attribute my shivering attacks to some sort of immune response. I never could tell why or when I would get them. I don't think they were due to me pushing or overdoing it. But during that time, I did chill very easily and always got cold. Maybe it was a temporarily weakened immune system which got overwhelmed fighting my chronic viral infections. I would be quite normal after I stopped shivering. I believe I stopped getting them after eating/taking GcMAF Bravo yogurt, because I also stopped getting constantly sick with a cold or flu afterwards. My immune system definitely improved / changed after the Bravo Yogurt.
The shivering could have also been a detox or herx-like reaction. Once, I had a terrible shivering attack and also got very sweaty, felt horrible with bad malaise. But it all went away instantly after the shivering incident caused a huge, urgent bowel movement that cleaned my entire guts out. Felt like I was a detoxing a lot through my stool and the shivering was a bad reaction to whatever I was detoxing.