Suggest Treatment For Lower Back Pain, Severe Cough And Crackling Feeling In Lungs

Hi, i have a Dr s appointment this coming Monday. But i just wanted to see if i should be making it an earlier day. I ve had lower back pain for the past 5 weeks and it s just getting worse. I ve had a bad cough with crackling in my lungs when i breathe and just recently been given medication for it. My back pain intensifies dramatically (often the pain brings me to my knees) when i cough or sneeze. I have tingling/cramping down my buttox and down the backs of my legs, generally stopping at the knees. I cant bend forward or backward without the pain coming. I woke up one morning with the pain, no strenuous activity or heavy lifting brought it on. I haven t had any incontinence or anything, but am pretty sure my pain pain is causing possible nerve problems. I am a 21 year old mother, and am getting quite nervous about it being something serious. I d appreciate some sort of answer for the time being, if you can. Thanks