What Causes Shortness Of Breath, Fatigue And Nausea?

Question : I have been experiencing severe shortness of breath, and excessive fatigue. I travel every single week and I am very accustomed to dragging a suitcase, laptop bag and personal bag, through airports it is not normal for me to be completely out of breath. Last week, on Wed, I got severe nausea and diarrhea. My husband got sick also. We were down for 3 days a piece. I have a lot going on now, plus a very stressful job so I am always assuming it's stress related. I have had major back surgery some years ago and in the last 3 years I have had two neck fusions and had a nerve burned. I now have severe lower back pain and I still have neck / shoulder pain. One last item it's odd but I keep getting almost like muscle spasms in my throat area. It's very uncomfortable. I know this us a lot. I need some help here. I have been told from all my MRIs that there are large cysts / tumors on both sides of my thyroids. I was having them checked every 6 months and I haven't had time to go back in about a year. Could this be blocking my airway??

Thank you