Need help PLEASE !?!?

Hi everyone , Im seventeen years old. Almost 2 months ago I woke up one morning to see floater 24/7 they didn't go away after 4 days so I went down to our local hospital to get examined. I went to see a optometrist & he did a exam examination with a microscope & dialted my eyes. He told me that there was nothing wrong with my eyes. I could understand how there was nothing wrong yet I was seeing this in my vision. I then talked to another doctor and he had told me that there was nothing the matter with me and that what I was seeing was normal floaters that everyone see's but does not notice .. he said they would go away over time. They did end up going away. Then here I am 2 months later and It's back agian. I do not want to go through that awful percidure agian for nothing but I am concerend and am not sure what to do. Im only 17 and my parents do not care that this is happening to me, I am very scared I am going to loose my eye sight. I see Tons of floaters usually on walls far away or in the sky when I look up.. I see them all the time in the dark , and I am scared i could possibly have a rentaial detachment , but wouldn't that have been detected the first time i went? please anyone can you help me?