It's good that you're able to identify some of your triggers, that can help massively. Reaching out to take that first step with therapy is hard. It almost feels as if you've failed because you couldn't fix yourself, but everyone needs a little help now and then. I felt so ashamed at the start of therapy over how my life had ended up, but now I can see it isn't my fault and is nothing to be ashamed about. Something shit happened to us and it's okay to need help getting over it.
There's lots of options to choose when you start therapy for how you would like yours to go. I tried exposure therapy but it didn't work for me and my therapist was so helpful and kind about it and suggested we try another way.
A big thing you learn is the difference between avoidance and safety practices and healing ones. For years I felt that if I moved house I was just running away from my problems, but now I've learned that environment and support have a lot to do with recovery and I'm now pushing through on moving.
Somedays you feel so disconnected from yourself and your old life and you feel hopeless about ever getting back to being you again, but trust me, therapy helps you to get back glimpses of who you are and it really helps to boost your mindset.
I'm currently doing a part of therapy that's like retraining my brain to find new ways of dealing with the flashbacks and for the most part they work. Definitely research the butterfly hug, it works so well and remember to remind yourself during a flashback that you're not there anymore, that it's just a thought and that you're safe.
Also, for in the moment panics, try the 5,4,3,2,1 method, if you know what that is. It helps to ground you and bring you out of the panic.
Please post on here at anytime whenever you're feeling triggered or low. Don't suffer alone. We are all here to support each other.