What helped me:
1. Therapist - Just to talk.
A good therapist (psychologist/psychiatrist) usually shows you a different perspective. I was stuck with my own thoughts. It might take some time for you to find a therapist that you can connect with, try different therapists.
2. Regarding salary - Join Blind (app) Every post has salary has salary mentioned. By just seeing salary on a regular basis, I felt comfortable enough to ask for a raise and I got it.
3. Started Journaling - (The Artist's Way (book) helped me)