Will my symptoms go after taking pills?

I have a bad case of Underactive thyroid (hypothyroidism) and every symptom on the list, you name is, I got it bad... from hair loss, muscle weakness, tiredness, poor memory, swollen hands and feet, bad immune system, shortness in breath, thin fingernails, deepness in throat!!! I am starting medication for it tomorrow and I was wondering will all these things I have go away? I hope so..

thanks for answers kind people and God bless.