Yes, it seems good to clarify, about where the shame comes from: being poor, or feeling "less than."?
For me, I had crushing shame for both of the above reasons. After a lot of therapy, I still have shame, but it is not crushing. Now, I can get out of bed, and I can experience a wide variety of emotions. Before, my parents' condemning voices "shame on you" echoed through my mind, whenever I wasn't distracted by a task in the present.
There were a number of things that helped me, with crushing shame over time. In therapy, verbalizing my "intrusive thoughts", and over the years, letting the shaming thoughts be about my abusers, not me.
There is also a means to have a supportive and empowering responsive voice for you. Gestalt, and Voice Therapy, encourage you to speak back (aloud, while imaging your that your abusers are present),
And repetitively stating my positive traits, helped them around both of the above sources of shame.
Body work and exercise are terrific too, to release the somatic memories and to build somatic confidence, respectively. Finding friends that make kind comments to you, rather than sarcastic and teasing comments, can make a big difference.
You can consider to believe and remind yourself, that as you chip away at the shame, that you are good, respectable person!