do i have an eating disorder?

[Shelley]

i had a baby 8 months ago i was 9 and a half stone now im 12 stone 11 and i cant help but eat all the time i have a bike and go cycling some times but it only last for like 3 days then im not motivated i want to be my normal size by my birthday but how do i keep motivated and stop eating all the time and i eat mostly when no ones around cos i feel embarrist if people see me eating...i would not eat for a few hours then binge eat and think to my self i should make my self sick but then dont am scared im going to have an eating disorder either that it turns around and i start not eating i dont want that either i just want to be my normal weight and healthy not moribly obese or 6 stone