Kind of new here even tho my profile says I've been here since 2015. I actually went to make a new account when I discovered I alrrady had one, I don't even remember posting on here...

I've been in therapy for a year and a half and finally I felt safe enough to tell my therapist about my experiences and that I think I have DID/OSDD. I don't know how I'll get a diagosis I just want help. I couldn't ask many questions since we ran out of time but next time I see her I'll be asking a lot about getting diagnosed or what we'll do.. But she asked for me to write down some info about my alters like their names, ages, personality for us to talk about next time.
My alters have been dormant or at least very well hidden for 4 years. They only come out when I am under extreme stress, and since I have been getting better obviously they haven't... But I've hit a wall in therapy and I realized I can't leave them behind in the healing which is why I made myself talk about them. I think even though I haven't been able to directly communicate with them (except for a few times) in he last few years, they may be blending or communicating in indirect ways that I couldn't notice because I would just ignore anything I thought was that... Because it scared me.
But now I'm trying to get back with them. Communicate openly and show them I'm trying to help. But it's been... Really hard. I've read through a ton of threads here and information elsewhere. I'm journaling, meditating and trying to have internal communication. So far only 1 has communicated and I can't keep myself from thinking it's my imagination. Everyone else has been... Just images or feelings.
I know all I can do is keep trying but I'm really worried now that I won't get that level of communication back. I've written letters of appology and tried to welcome and comfort them and let them know it's safe for them. I've eased off because they got mad and told me to back off (again though I had trouble not thinking I was imagining things). Any advice?
I know it won't change like the flip of a switch but I was hoping they'd come back out once I opened up... I am also worried they can sense my underlying doubt still and so they are mad at me or do not trust me. This is the most confusing thing ever. Thanks for reading.