Am I a possible candidate for stroke?

Hi doctor,

I recently lost partial vision in my left eye. I was diagnosed with retinal ischemia by an eye specialist. After an angiogram, he suspects a small crystal of plaque blocking the blood supply to a portion of my retina. He told me I should see a cardiologist fairly soon, as he has worries about where that plaque is coming from and that I am a possible candidate for a stroke. The earliest I can see a cardiologist is still a week away. I am wondering if this is more urgent than that. I am 54 years old, currently taking Prednisone and Methotrexate for recently diagnosed psoriatic arthritis. I also have controlled blood sugar with Metformin and cholesterol with a small daily dose of Atorvastatin. I feel fine except for the vision loss. Thank you.