Hi Dbz33! Welcome to WrongPlanet!
Although you may have to wait until you turn 18 to receive a private diagnosis from a doctor, you may be able to take some self-diagnostic tests and read up on your own to get a good idea.
You say that you are in your teens. Would you mind telling us exactly how old you are? If you are say, 16 or 17, an adult self-test is probably pretty accurate. If you are 13 or 14 it may be less accurate. If you are 15, you could take a test and just keep in mind that it may not be completely accurate.
I recommend taking both the RAADS-R and the Aspie quiz. I do not recommend the AQ, especially for a teenager. I know it's tempting to take the AQ because it's so short, but it has some misleading questions in it, it is too short to be accurate, and much of Baron-Cohen's work has since been debunked or at least called into question, although he did bring up important questions in autism research.
If either of those tests are confusing to interpret, just let me know. I am NT and I have my own test results saved for comparison.
I would then read up on posts from autistic young people here on WP and on similar sites. They may discuss things that are also a concern to you. Their experiences might help you to decide if you are also on the autism spectrum or if maybe something else might make more sense to you.
You could also explore the possibility that you have already been diagnosed and this has not been shared with you. This happens sometimes with younger people. Their parents may not accept the autism diagnosis or may have decided that it would be better for their child not to have a label.
Sorry for the long reply. I hope some of this is helpful.