What did they tell you at the ER? While most of us with any kind of anxiety disorder can relate to nearly all these symptoms, blurred vision in just one eye is not typical. I suggest you make the appointment with the cardiologist and follow his/her advice as soon as possible.
A lot of things can cause these symptoms, including anxiety (other than the blurred vision). Thyroid problems, blood sugar imbalances, hormonal imbalances, nutritional deficiencies ( such as Vitamin D and magnesium, to name two), migraines or migraine-like vascular irregularities are some that come to mind without even thinking about it. So just be patient until the docs are through looking into this. Question: as this has been going on, is your anxiety peaking as well?