I started to work last summer as a wedding photographer, got published in a couple of magazines and some of my photos are now pretty popular on this website.
BUT, I realised after 2 years that it wasnt going to pay the bills and that its a really hard field.
After a few months of questioning myself I decided to go back to school in Physical Therapy.
The thing is, when i was in highschool, I didnt care about maths or physics because I knew I didnt need it to go in the photography program.
Now since its required to get in the program I want to, I have to go back to Adult school, to finish my Maths Chem and Physics. IT SUCKS
Not sure how it works where you are but if you can , make sure you get all your classes done when you graduate, that way you dont have to go back.