Stopping your lipid-lowering medication (a combination of rosuvastatin and fenofibrate) abruptly is not recommended, as your triglyceride levels can rise again. Additionally, thyroid function directly influences lipid levels; an underactive thyroid can actually cause or worsen high triglycerides. Please consult your doctor soon to get your thyroid levels and lipid profile tested. They will determine if you need to restart your medication, adjust the dose, or focus on optimizing your thyroid treatment first. In the meantime, focus on a heart-healthy diet low in refined carbohydrates and engage in regular exercise. Do not panic, but seek professional medical guidance to safely plan your next steps.