25-40 pounds. Your doctor can tell you if you're in the right weight range or not.
The amount of weight you gain during pregnancy may depend on the weight you were before pregnancy, it also varies heavily for different people. A woman of average weight should gain approximately 25 - 35 pounds during pregnancy, underweight women often gain 28 - 40 pounds whereas overweight women may gain as little as 15 to 25 pounds.
6 months
Not as much as you pay for the 18 years afterwards.
1gallon
Hiccoughs are always normal. Don't worry so much!
It depend on how much you workout.
There are many reasons: pregnancy; gaining or losing too much weight; medication. In any case, you should consult your doctor for proper diagnosis and treatment.
20 pound
7
It can be anywhere from 2-18 months. If nothing has happened in 18 months see a doctor.
20