you said you suck at math. well you dont have to stay that way.
https://www.khanacademy.org/math/arithmetic/addition-subtraction/basic_addition/v/basic-addition
go thru it no matter how simple it is. then look up to the top left. go there next. do that stuff. no matter how simple. then keep moving on.
you will no longer suck at math if you keep doing this. you will actually be very good at it.
you suck at math because you missed some basis stuff that your teacher should have stayed on you about. but didnt. so you never learned a couple of key principles. once you learn those. the Fog that covers math and makes it seem scary to most will go away.
i say do that above stuff before you go back to school. you can also mess around with other subjects on her to prepare you for school if you're going back. you could be ahead of the game by the time you go back.
remember we didnt have the internet game on lock like it is nowadays. school + the internet = easy C without thinking about it. school + the internet+ a little studying = a B to B+. if you actually are serious with studying. school + the net = an A.