I need help walking again

I understand that asking you all for money in today’s economy is much and for that I am so sorry. I injured myself 3 weeks ago and I haven’t been able to walk. I bike to get everywhere, the grocery store, the doctor, and most importantly work; However due to my knee injuries I have to Uber back and forth to work and it’s getting to be very expensive. I would crutch to work, but it requires a lot of strenuous effort and it’s very tiring.  I really need help because my job isn’t taking me seriously and requires me to get a doctor’s approval to accommodate to me. Speaking with my Uncle a renowned world class runner six times and physical therapist, and my friends dad who is a physical therapist, they are suggesting that it’s more than likely damage to a serious ligament or tendon such as LCL or Meniscus. My Job believes my doctors misdiagnosis of ITBS which according to her should have healed in the week. Three weeks later and I’m getting worse. I can’t seriously heal unless I get an MRI determining what is actually wrong and how to act accordingly but an mri is 900$ each knee + 200 per reading the scan. I can’t afford it and I need help. I want to use the restroom properly, cook meals for myself, and get in and out of the tub with no issues, and I never realized how much of my knees I needed when completing even the most basic of tasks. Even a share would mean the world to me. Thank you, and God bless each any everyone of you.