Relationship Help

Me and my girlfriend have been dating for 3 months now. Whenever we have sex and use a condom, she usually dries up. Her mom adviced her that if she wants to get an implant (a contraceptive implant) to let her know. My gf doesn't want to ask her mom for the implant because she feels like it's too early to tell her mom. (Her mom just found out about us). And I want her to get the implant because I'm scared of getting her pregnant when we have sex without a condom. Any tips or help in any form ? Thank you in advance.