B.K.
Since I am not a doctor, I can't tell you what to do with your medication. But, as a person who was diagnosed with Thyroid Disease twenty years ago, I can tell you what happens if you don't take care of it. Your thyroid controls your metabolism, which controls your heart rate and your nervous system. I had my thyroid removed when I was 24. Before the surgery, I was on Synthroid for 5 years. I developed a tumor and my thyroid had to be removed. Shortly after the surgery, I lost my balance and had could not focus my eyes. I went to the emergency room and they thought that I was having a stroke. To make a long story short, my synthroid dose was not high enough so my nervous system went crazy. They increased my dose and I've been fine since then. I don't know if your doctor told you this, but you cannot live without some kind of medication. It's not as bad as cancer, but you can die from Thyroid Disease if you don't control it.
I just noticed that you are recently separated. Thyroid Disease causes mood swings that are uncontrollable. You may notice a huge change in your disposition once you get your thyroid under control. Don't give up on your marriage until you know that your thyroid is properly medicated.