I am praying for you to resolve these issues.
Do know that often times the medications that are prescribed post stroke, such as coumadin and related blood thinners can cause these exact symptoms you are experiencing. Also many stroke patients have had a history of high blood pressure and are also on medications for this as well. These drugs also cause the symptoms you are experiencing.
Change your diet to one that includes a predominance of uncooked fruits and vegetables, take all salt out of your diet, take all foods that have preservatives, colorings, monosodium glutamate etc and get them out of your diet immediately, and limit your use of ALL animal products to 1 meal per week. What you will see happen is your blood pressure will drop (as well as other symptoms from related syndromes like diabetes, arthritis etc) and as you are able to lower your medications your symptoms will recede. The fact that you have had such good improvement in 2 years time is an indication you can recover further. Prayer is awesome but we also must change the things in our lifestyle that are not in keeping with the word of God. When we make medications our God and our desire for incorrect foods our God, we will experience the consequences of our behavior. Seek ways to get your medication lowered, then get your diet and exercise in order, try acupuncture which is very effective post stroke and keep praying for God's will to be done.
I pray for you my friend. Be well in the name of our Lord and Savior Jesus Christ.