Help i've got bronchitis!?

I've been coughing at school just a little bit, But after a while it turned into a nasty cough so i went to my doctor and told me i had bronchitis.He gave me antibiotics and a inhaler.so after getting them i rest threw the night peacefully. But i had a even more nastier cough which i took a lot of my in haler. My inhaeler had 204 abd u went to 44 and i over dosed.so i had a hard time breathing.but when i moved a colder spot in my aparment i could breathe and cough less? what should i do?