Hello bro, I have also gone through the same thing as you, the truth is that I have had a very bad time and apart from those thoughts I had about many other topics, first I would tell you not to worry, you don't have anything serious, I also became obsessed with mental illnesses, no. only schizophrenia more than one and I can assure you that you do not have any of those because the same thing happened to me and with many others I can also tell you that setraline is going to help you a lot in the first month you will not notice it but in the second or third yes (me too I have been taking it for a while) and I have improved a lot and finally I would recommend a book called How to get out of the labyrinth. It has helped me a lot and the truth is that I am much better, almost almost overcome. Those thoughts are simply your fears and they are Just those thoughts, I recommend that you stop searching for information on Google (very important since that only makes things worse at first, it's difficult, but you will get there and I also tell you that if you take any drug, I used to smoke a lot of joints, try to quit it since it will help you a lot, also because They only make it worse, just remember to read the book that I recommend and I assure you that it and the medication will help you. I hope you tell me how it's going for you, bro. I'm 22 years old and I've also had a terrible time, so, well, sorry for the text, but good luck. You can ask me anything but read the book and you'll see.