Talk to Endocrinologist on Thyroid Issue?

Need expert guidance. Years ago after taking whey protein working out my thyroid swell and I discovered a fever type and got sick for few weeks. Later I have developed more symptoms of low thyroid. Had few like low body temp and dry skin. But after whey it’s been 5-6 years now. I have gotten more symptoms. Weak muscles Cold feeling Sleep problems Low or non existing libido Ed Weak digestion system feel foods not digested as easily Low energy

I have taken iodine in hopes of it being low iodine but it it has not helped. Sometimes eating certain foods like yoghurt and whole wheat porridge make me feel better but to a certain extent only other times when I eat protein food I feel cold afterwards. All labs other seem okay. Free t4 seems low. Can a doctor help me what I have