Totally normal. Everyone goes through that initial stage. Try to eat six small meals a day and avoid junk food, high nitrate foods (lunchmeat), and other things with lots of sodium. Fresh fruits and veggies will restore your vitamins and minerals and depending on your lifestyle (If you work out) you may need a multivitamin because heavy exercise depletes those also. Eat as much protein and health fats as you can. Think of it this way, like a house:
- Fruits and veggies keep the electrical system and the plumbing in good working condition
- Protein rebuilds whatever has broken on the frame
- Carb's such as potatoes, rice, bananas, grains, etc.. Provide the power (energy)
And drink a lot of fluid (half your body weight in ounces every day), a lot of toxins build up from drinking. You need to flush that garbage out.
And get the body moving even if it's a long (or short) walk.
The body heals quick when properly maintained.