Understanding myself as someone who was diagnosed later(24F)

Hello fellow add and adhd aliens

Like the titles suggested I wasn’t diagnosed until I was in my early 20s which was like gosh almost 2yrs ago going on 3 now.it’s been alot of learning and accepting myself,that I wasn’t broken and their were others experienced the same experiences I’ve had and that made me feel really seen and like I wasn’t alone in the world.

But I’ve been dealing with alot of heavy emotions lately that has draining my ability to be not so responsive to others emotions so I don’t react right away and it turns into a whole thing cause I feel like I react before I think so words just come out before I crafted the right words to convey my message without over explaining and I easily get frustrated/mad/upset with people and I can’t control it when the person is coming into the conversation with negative emotions and instantly mirror that people even before knowing the context of conversation in the first place which just turns into a bigger fight/argument

I guess what I’m trying to ask is how to people in the control their emotions so it doesn’t get the best of you and creates further strain and distance from those around you that’s supposed to be your support system?