I "thought" I had glaucoma. I have had high pressure readings for years, maybe 15 or so, can't really remember for sure. I used to work part-time for an opthalmologist and he would check them for free, I sure do miss that, ha ha!
I was diagnosed with type 2 diabetes about 8 years ago, so started seeing an opthalmologist (normally just went to an optometrist for eye exams) and he put me on Xalatan for the pressure and talked about glaucoma but never really came out and said I had it. He put me on another drops (brimonodine) a year or two ago which I was using in the morning, then the other at night.
I see a different doctor now, and my pressures were 16 and 18 and he wanted me to have a test to determine the thickness of my corneas as he said that could give a false reading for the pressure. So I had that test done and he called and said I have unusually thick corneas, and has had me off the eye drops for two weeks. I go back Monday to check the pressure, and will talk more about this with him then. I would love to get off the drops.
I know that with glaucoma you can lose the peripheral vision if it goes untreated. I have not lost any of my peripheral vision over the years.
I can understand you being nervous, but I think glaucoma is very treatable, if you even do have it. Try not to worry.