You need to give more details on how the pain started dear.
When u lean over, did u fall? if u did where?
Does it make u easier to breathe when u sit down, or stand up?
Describe the quality of the pain that u are refering to.
Do you only have trouble breathing?Or there's other pain that were cause from that fall?
from 0-10 0 being the least and ten being the worst, tell me how bad the pain is?