NEED HELP ANSWERS FOR GOITERS

I have recently discovered a growth in my neck. I have never in my life heard or seen anything about Goiters Hypothyroidism or Hyperthyroidism.  I have been having tingling sensations throughout my body and spouts of dizziness.  I am having a terrible time swallowing my food (it feels like the food never actually goes down no matter how much fluids I drink to wash it down) I cannot for the life of me sleep a whole night I wake up at least once a night having coughing fits.  I am so exhausted, have zero energy.  I used to like to go out with my girlfriends/family/ and boyfriend but all I want to do now is sit in my room.  This is so unlike me I am so depressed.  All my life I have been 110 pounds or less and I am now 130 pounds and it kills me.  Does anyone have any advice?  I see the Endo IN July 1st, which is also frustrating because I have to wait so long.  My TSH and T4 were in normal limits. What should I do I am really scared to be honest?!!!??