Levoxyl and sonogram

first Ihave had a pain like someone poking their finger in my throat half way down the first near the middle then I went off and when i wnent back of I had a pain in that same spot...I was told I was taking it to shrink nodules but it reallly bothers I will goback to the doctor again sho uld I ask him for a natural product??? by the way I had a sonogram and it sowed two medium modules and one large which could be cancer went to another doc who read the sonogram and he should htere are only multiple nodules and w3e will only watch them for a year....so figure that one oout