possible tia

Since November I have had some interesting symptoms. My left would tremor then go numb. I have gotten up to walk and couldn't my legs just stumbled about like a baby taking his first steps. I have developed stuttering that seems to be made worse with every attack. My legs are always cold and I have a consistent pain with swelling with pain in my left calf. I get dizzy and confused during these attacks also. The mra that was taken during my attack showed slight narrowing in my neck artery. But the next day when they redid the test nothing was there. Yet o was still stuttering and weak on my left side. I have a family history of stroke, heart disease, high cholesterol, and high blood pressure. I am also African American and I have been taking the drug Yaz for 5 years.