I have a white line in my mouth and it feels like i have bumps there also but i can scrape the white stuff off what could it be ?

Linea Alba: Which is latin for white line.You can scrape it off because it's usually hyperkeratosis (excess skin).It's a result of cheek biting .Go see a dentist , your teeth are probably in crossbite.

Thrush: It sounds like it may be an oral yeast infection, called thrush or candidiasis; but you need to see a physician or dentist for a definite diagnosis and appropriate treatment.