If you mean checking your daily fitness, I used to track my steps and do light prenatal yoga only because my doctor cleared me for it. Always listen to your body first.
Whether you are checking blood sugar or thyroid, please don't rely only on home kits. Regular doctor visits and proper lab blood tests are extremely important.
I remember constantly checking my weight and bump size every week. Looking back, I realize I was worrying too much, everything falls into place naturally!