Both of my thyroid lobes demonstrate heterogeneous echotexture without focal nodule. right lobe measures l: 3.37 cm, left lobe measures l: 3.33 cm?

Thyroid: A heterogeneous, normal sized thyroid may not mean much, or it could indicate one of a number of inflammatory/infiltrative processes i.e. thyroiditis. Sometimes symptoms may not be noticed. The thyroid US findings must be interpreted in conjunction with lab values/thyroid function tests, symptoms, and clinical findings to assess the significance, so best bet is to discuss with your doc.