Birth control

Hey guys i am 18 and still kinda new on here i have the nexplanon snd it had moufunctiond a couple times and i want to switch back to the shot but my mom has been giving me a really hard time about it to the point she is telling everyone i am sleeping around and trying to grt pregnant and now today she is on my side about switching i have an appointment next Wednesday and i am scared shitless ughhhh i dont want my mom to be in the room i want my man