I Need Help, Please Help Me

am i a bad mum??

i have been recently diagnosed with anxiaty an depression i will do anythin for my kids there my world my son wanted a ride on motorbike for christmas this year its the only thing he has asked for (i have got him loads of other stuff) i got him the bike an was so excited to see his face i put it together today (xmas eve) an left it to charge after 8hrs i was mortified to find the bike still doesnt work i brought it brand new i cant stop crying and i feel like a failure as a mummy. my son has autism and learning difficulties he is 56 months old but his brain age is that of a 24 month old.an i know he is gonna be devasted in the morning when he wakes up.