How do i build my.confidence?

Im 33, i have a low.voice, stutter.. i have bad anxiety. No abuse or anything i just have no confidence.to fje point i was bullied at a previous job by a 20yr old andbbroke down and cried. Im very ashamed od myself. I have a therapist but she doesnt help much, she doesnt give me any hwk or anything.. idk what to do to help me atand up for myself.