4 weeks later.. Mri scan kidney

Anyone had an Mri on their kidney? I had a ct scan on my stomach weeks ago which showed a hernia.. Also it Found a swelling on my kidney. In the letter it said it can be common for lumps of fat to be on the kidney and it can just be that. But obviously I can't help but worry! I have a follow up appointment for this Thursday to get my results but my scan was 4 weeks ago now and I can't help but wonder why they haven't been in touch sooner and have left me waiting 4 weeks :( I also have a lump in my lower back which isn't helping the anxiety, I'm hoping it's just the hernia as I've had it for 7 years now!
I don't even know what I'm asking here it's not a question as such just wondered if anyone has anything to help calm me down or has been through something similar? Just getting letters from the hospital and not actually getting to speak to someone doesn't help just leaves me with lots of unanswered questions and worry. Thank you x