Hello I Had Heart Bypass Surgery In 1992. Since Then

Hello I had heart bypass surgery in 1992. Since then I had one stint. Most of my bypasses are plugged except for the main one from the mammory artery. My Dr recommended me for bypass surgery after a heart cath in July. The Surgeon didn't think the surgery would improve my heart so I didn't do it. I do take Renexa and have beentaking it for five years, For some reason my insurance has maxed out this year and and I cant get anymore until January. How will going cold turkey until January effect me.