So I don't know who can relate and give advice but I have a thyroid nodule (non cancerous) that I…

So I don't know who can relate and give advice but I have a thyroid nodule (non cancerous) that I discovered with my last pregnancy. Now with this pregnancy it is getting much bigger and I feel like I have a lump in my throat and it gets difficult to swallow. I told my doctor and she told me to go to clinic on Monday... but it's hard to swallow now so what if it gets hard to breath? I don't know if I should head into the ER to have it biopsied again or just go in Monday?