I'm stressed I'll fail my senior year... I made a commitment to myself that I'll show everyone that…

I'm stressed I'll fail my senior year... I made a commitment to myself that I'll show everyone that no matter the shit they talk I can do it... when I left tmy father's house he told me I'd be pregnant by the time I was 18 ( I am but with a mani be been with over a year) he told me that I was gonna fuck up my life when I left... when I got here to Texas I got a job. I started passing school.. I finally made friends I used to be home schooled and never spoke to anyone it was just me my tv, books, and phone. I always got myself into trouble. my father was always horrible to me... I promised myself I would prove him wrong and pass and graduate on my own but looming at my grades I'm having so many issues with math :, ( makes me stress so bad that I have nobody to help me.. when I lived with him and asked him for help with anything he'd always yell at me and tell me he'd just do it when he got off of work... but I was just asking for help... idk what to do.. I need to do this for myself to show myself I'm not what he said I would be... :, (