Brith control

So my boyfriend & I have been having sex he does NOT like to use a condom so we were at his parents house and he always sleeping but I'm there of course so his mom like y'all have sex blah blah and he walking out the room leaves me && she like are y'all have sex of course I said no cause my parnet doesn't know so why should I tell her and he was like are u on birth control and of course I said no im not she was tell me I need to get on in and allat that  so I want to ask my mom but I don't want her to know I'm having sex with my boyfriend and my mother always tell me if y'all thinking about having sex tell me & I'll get you on brithcontroll but am scared she going to be disapointed in me  
(Age:16) 
HELP ?