Eye doctor question

I used to have perfect vision, but a few months ago it drastically changed.

I started having a lot of eye discharge. There were a lot of "boogers". Sometimes it was so much, it was like a streaky film over my eyes and made my eyesight very cloudy.

I went to the eye doctor because I thought I had conjunctivitis. He said it was not conjunctivitis. It was actually allergic conjunctivitis. He gave me medicated eye drops for a week and also told me to start taking allergy medicine. I did what he said, but nothing changed.

I went back because I couldn't believe how drastic my vision changed since the eye discharge started. The doctor insisted it was allergic conjunctivitis and that there was nothing more I could do. I went to another doctor who said the eye discharge was normal, especially in the morning and night. But it is NOT normal for me.

I need some type of medication and probably glasses now.
What can I say to make a doctor take me seriously?