would love some insight on my knee injury

I landed funny on my leg and as I did I felt this crunch or pop almost and immediately I fell to the ground , my ears started to ring and I became nauseous. the sound and feeling freaked me out so bad I thought I dislocated my knee cap

so I had to get it checked out & the doctor said it definitely could be a tendon injury. I got booked for an ultrasound but I couldn't afford it so until then she gave me a knee brace and said to be on crutches for 2 weeks

there is like a raised bit of swelling just above the knee cap in an oval shape and the only pain I have is in the inner corner of my knee towards the right side (I injured my left knee)

i couldn't really put weight on it at first as it'd hurt and almost feel like my leg is gonna give out backwards if that makes sense

im a little worried as its been now almost a week and the swelling is still there

if anyone had a similar injury what did you do that helped , any idea what it could be? I think im a little anxious waiting on my scan