Those small lumps need to be tested. They may be tumors, even though they are probably benign. Of course, the "cure" for thyroid cancer is often worse than the disease (these days, the "cures" are often worse than the disease with a lot of diseases). Discussion of a cure for cancer is beyond the scope of this forum, and one is advised to seek competent help.
Sluggish thyroid, on the other hand, is more common. One suggestion I might make is to see how much soy oil or soy protein you take on a regular basis. It is hidden in many foods like meat flavored sauces, stuffing, and some fast "food". Hydrolyzed protein is often soy, and textured protein is also soy. Besides the effect on your brain from the glutamate, these contain sizable amounts of isoflavones that are known to impair the thyroid and impede absorption of nutrients. I would suggest reducing or eliminating foods that contain soy products, except lecithin, for a period and see if the condition improves.
The other thing I recommend for thyroid sluggishness is coconut oil. If you have a problem in this area, I suggest taking 2 tablespoons of coconut oil a day, possibly in place of other cooking oil, for about a month. Doing this should give you more energy if indeed your thyroid is sluggish, because it feeds the gland. The worst side effect is possible mild diarrhea, which is from candida die-off (the stuff produces monolaurate, which kills candida yeast but leaves good bacteria alone). These episodes are not severe and usually leave one feeling more cleansed.
If this doesn't work, then you might still have to take meds or get other causes ruled out. As I have seen other threads on this forum about diseases in the past, I must advise that no forum is a substitute for a good medical examination. But, one can get advice on managing a diagnosed condition or on avoiding unnecessary medication once diagnosed. And, as I generally advise with this sort of issue, I suggest a Google search on coconut oil and examination of at least three independent sources before taking my word for it.