LB – if the point was that you felt you needed to discuss it with someone because it was “all bottled in”, it was 100% mutar! Not only that, but it was probably an obligation! Hashem wants us to be emotionally healthy. You are allowed to talk about something if it’s for the purpose of your emotional health – to make you feel better about it.
It is best if you can find the right person to talk to – someone who will understand and help you to deal with it. It sounds like that is exactly what you did!
I think I once told you about a pamphlet called something like, “How to get deeper into Torah without going off the deep end”. I believe it talks about this issue here – it gives a basic guideline for knowing when it’s forbidden and when it’s permitted to speak l”h.
One of my teachers once pointed out that sometimes people are too careful about L”H and don’t speak when they should.
When you are trying to figure out if something is L”H or not, I think the two things to think about are: 1. What is your purpose in saying what you are saying? 2. What will the results be?
Bottom Line: no teshuva needed here.