Not sure if my problem is Areds2 or Fosamaz

I started taking Areds2 in October 2024 and was miserable, nausea and vomiting occasionally. When the doctor and I figured it out I was taking too much vitamin E so I stopped all other vitamins and things settled down, until the end of May. I was prescribed Fosamax, once a week, and started that on Sunday, May 25th . On the 31st of May I started with a cough that I thought was allergy or from the smoke from the fires in Canada. After two weeks I went to acute care and put on a z-pack and prednisone. When I finished taking both prescriptions there was no difference in my cough and it may have been worse, sometimes like the whooping cough I had as a kid. My throat was so dry it felt like it was closing off. It was so bad at night and when I woke up that I started sleeping in my recliner because laying down was making it worse. Consulting with my doctor we decided to stop the Fosamax for 2 weeks. That 2 weeks is gone and the cough is still there, however, I forgot to take Areds2 on July 5th and the next day the cough seemed to get better, but still not gone. I decided to stop taking the Areds2 and in checking the internet for dry throat discovered that Areds2 can cause a dry throat. What I would like to know is if the Fosamax triggered the dry throat that seems to be caused by the Areds2. I’m staying off the Areds2 for at least 2 weeks and if the dry throat is gone I’m not going to take it again.