im 14 and have been in a serious relationship for a very long time but the only thing putting me off sex is if i got pregnant my mum would kill me, but my friends said you could get rodded ? i do not know if thet is the proper name but its a piece of metal in your are and can stop you from getting pregnant for 1 or 2 years i dont know if this is true and if so could you tell me exactly how it would work and if you could get it with out your parents knowing ?

thankyou