I Am Experience Shivering, Freezing And Shaking Off And On.

I am experience Shivering, freezing and shaking off and on. No fever. I am in a nice warm home and it's 70 degrees outside, but I have the Heat set to 73 to keep comfortable, until the shaking and shivering starts again. No energy. I am 75 yr old woman, who just moved into a new home 1 month ago. Been in extreme stress. I had a UTI all during my move, for 10 days. My Primary did give me an Antibiotic, that immediately alleviated the misery and pain. I had already taken 2 Anti-biotics in the past 2 months, 1 for my first UTI then an absessed tooth, so didn't want to take a third Anti-biotic, as I know what the side affects can be.