I had IDF and pulmonary fibrosis before having a double lung transplant (you can see my story). I have had many biopsies. In fact I just had another one last week with a bronchoscopy. There are risks associated with anytime that they give you anesthesia. They put you under, perform the procedure, and then wake you back up in the operating room. Due to having the tube down your throat, you have a sore throat for a couple of days. It really isn't painful, just sore. They will tell you what time you can have something to eat and drink. If you have hot soup or tea afterwards, it is supposed to help it heal better (I just never tend to).
I wish you luck and hope that you don't worry too much. Remember to give your worries to God, because you worrying about it won't help.