Hi I Went For A Eye Exam Last Week And

Hi I went for a eye exam last week and seems like my left eye has a issue .I was directed to a retina specialist. Went yesterday and had many tests.I was called today said I need to start treameants next week of injections in my eye.
I was told I won't get all my vision back and this is so it dont get worse.I am in tears right now not knowing if I should do this or see somebody else.The total amount of test were done yesterday were like 1,200.00.I don't have the best insurance and not sure if they will Evan cover these treatments.
what are my options on this.Do I really have vision loss that I can never get back?
what should I do?
Thanks