Advice after a so called Suicide attempt!?

Okay so about 2 days ago i tried to have an overdose on pills, not really intentionally to kills myself but that i didn't know what i was doing if you understand? so luckily at the hospital i was okay no damage to my liver or anything. But i went to the hospital in an ambulance since my parents were at work. when i was their they called my parents at work and i had to talk to this crisis worker to see if i could go home in case i harmed myself again... and this is all happening the week of my exams im 16. But when my dad came to pick me up from the hospital he was shocked and really supportive and was upset that i couldn't talk to him about how stressed i was with school and soccer. While my mom was yelling at me saying how she was disgusted by the thing i did, and giving me stories if i ever have a custody battle for my kids, i would lose cause they would look back that i tried suicide and that i ruined any big job. She said i did it just to get out of exams which is NOT true but she wouldn't listen she just said how she never wants to looks at me again or even help me with school again. and it made me cry alot because shes Always the supportive one and she didn't even care, that i could of died or ask if iw as okay, she just kept yelling at me. What am i suppose to do? Why is she acting like that? i know i did something stupid and regret it but still. Its the Summer and now i have that on my back. What can i do to get my mom to forgive me and help me forget about what happened! any suggestions?