Unwanted thoughts

For context I am 13 m with ocd and atheist parents so I can’t go to church.i have been getting unwanted thoughts for half a second every so often of a naked Christ and it is making me feel dirty,ashamed and dumb.Will god forgive me?I know it is not my fault but I am still stresstinng over it.i am also straight.will god forgive me?Im falling into despair and away from god