I've noticed myself that I have great trouble thinking when my temperature is <=97.4 degrees. Even though 98 degrees is itself low, it just feels so much better. It's easy to be social and talkative with temps in the 98's. Otherwise, it's easy to live in a cave. It might be something to explore. One experiment is to take your temp 3 times a day at 3, 6, and 9 hours after you get up. Average each day's temps. After 5 days, look at the averages. If you have a variance of more than 0.2 degrees, you have adrenal weakness. If your averages are also low, you need thyroid support. It might give you an idea of your target organs for therapy.
I'm sorry your mercury thermometer broke. I've had trouble with digital thermometers myself. The 3-temp average is meant for your active part of the day - 3, 6, and 9 hours after you get up. Your rising temp and going-to-bed temp are interesting, but not part of the 3-temp average.
Depending on how much water you drink, that either is or isn't a lot of salt. If you only drink 1000 ml, you're getting 1 teaspoon of salt, so okay. Not enough water, IMO, but that's another issue. However, my mind boggled when I thought about 1/2 teaspoon per 500 ml for the 4000 ml of water I drink a day. 4 teaspoons of salt! For a brief time I once did 3 teaspoons, but paid for it. Thought I'd never stop being thirsty :) Dr. Batmanji's original formula was about 1/4 teaspoon per liter, give or take personal needs. There are as many formulas as there are people.