hi! so i’ve been thinking i might have bpd and i have no clue how to bring it up to my therapist

i want to email my therapist because i’m better at bringing stuff up and opening up about my emotions through writing and i want to do it by this friday because i have a session with my therapist on saturday

do any of you have any ideas/tips on how to bring it up to my therapist? like what to do and not to do and what i should say?