2 weeks back i went for an mri, so it was too cold there after coming back i had pain in bone of my throat.. i did saline water gurgling and it eventually went away. Recently i have been feeling like my throat wall(attached in the picture), while swallowin it feels like my uvula touches the wall or something (as if its dry and uvula touches that). Or as if something is stuck in throat. I observed these cobblestones in throat(picture attached). Please guide me what can this be. Is it infection? I have a little bit cough production also. Please help me.