I am really sick, any advice on getting better quickly?

i started out having a cold, and yesterday i woke up and i wasn't breathing properly. my mom said that i sound like i did when i had croup when i was younger, and she said it might be bronchitis. when i breath in i kind of sound like someone who has asthma. i have an extremely sore throat and i cant sleep properly. do i have croup? can teenagers get croup? i am 16, does anyone have any tips on getting over this sickness?!