Back Pain

I’ve been working at Lumber/Building Material for about 2 years, our store has high foot traffic and our costumers are lazy and barely want to grab their own stuff, I been having back pain for about 1-2 months, asked to be moved because my pain is getting worse, I was hesitant to see a doctor because the pain is on and off sometimes, well I finally decided to see a doctor, I’m hoping to get a doctors note stating I can’t do any heavy lifting or major physical work. Question is, will the note be enough to get moved out of lumber?