I have high bp 189/90 and am dizzy, unalert, unbalanced,
I would recommend going to the ER.
Welcome to Ask a Doctor service!
Your symptoms could be related to a TIA, especially considering the unsteadiness in the left leg.
For this reason, I would recommend going to the ER for a physical exam and some tests (a resting ECG, a brain CT scan, blood electrolytes, etc.).
In the meantime, I recommend taking another tablet of lisinopril 5mg or a tablet of clonidine to help lower your blood pressure values.
Are you taking any blood thinners like aspirin? Considering your past TIAs I would recommend taking baby aspirin too.
Hope you will find this answer helpful!
I remain at your disposal for any further questions whenever you need!
Dr. Ilir Sharka, Cardiologist