If you have been wanting to get off the thyroid meds, perhaps you already know the answer to your question. If you want to act more cautiously, can you take a half pill for a couple of days and see how it feels?
Are you having any symptoms of too much medication (hyperthyroid symptoms). When my meds are too high I have trouble sleeping, feel extra sweaty (especially my feet - gross), my heart races, and my hair starts coming out in clumps (too much or too little thyroid can cause this).
Most importantly, if you want to stop taking the meds, do it. You can always start them back up if you run into problems. Your thyroid affects a lot of your body but it isn't life threatening in the short term like diabetes or heart conditions.