Your thyroid is still working, even with nodules. Doesn't mean anything by itself. I have heard of bigger nodules. I had perfectly fine thyroid function, I had four nodules and normal levels, but lots of symptoms such as hoarseness. Turns out I had cancer. This doesn't mean you have cancer, just means there is a slight chance. Are the nodules smooth and round? Vascular? Solid or cystic? Wait for the biopsy, it may or may not tell you what you need to know. You have a good chance of finding out what it is, however you have about a 40% chance that they will not be able to get a diagnosis. Nodules themselves have about 5-15% chance of being cancerous, so the odds are that it is not cancerous.