My teeth lean inward very much but I don't know if an orthodontist will even fix it. Should I go to an orthodontist? (Photo)

You should go see an orthodontist to get options for correcting your smile.  Be sure to mention you get headaches as your bite can influence your jaw position and lead to headaches.

Hello Amani,
Thank you for bringing your question to the RealSelf Forum! I recommend seeing a general dentist that is certified in Invisalign treatment, so that he or she can take a comprehensive approach to your treatment. There have been many advances in Invisalign treatment over the past 15 years, and they can now treat any alignment or bite issues that would be treated by traditional orthodontics. By seeing a general dentist, you can also address any restorative issues that may exist. Always check the credentials of your provider to ensure that he or she is well qualified and experienced to treat the types of concerns that you have.
Best Regards,
Dr. Rada Meytin