Hi there, I am sorry to read that something went wrong and pleased to help you now.
Of course you need an evaluation to find out if you really suffer from claudicatio, which is a consequence of arteriosclerosis of your leg' s arteries.
It would be the easiest way to get referred by your cardiologist who, in fact, might even be able himself to check your arteries by doppler ultrasound. He defininitely is able to do that, the question is if he hasgot the equipment. But since you have some time, you can wait until your cardiologist returns.
You don't necessarily need a vascular surgeon, an angiologist can perform the necessary ultrasound as well.
So: I think, your cardiologist is responsible to help you examining this issue; either by referring you or by doing the examination himself. Another possibility is being referred by your PCP. if your cardiologist will be out of town longer, I would ask the PCP.
If I didn't make myself perfectly clear, please don't hesitate to ask!