No you can't have more than one therapist trying to work with you at a time, unless they are working together with you if you want to keep what mental health you have IMO

Yes, you can consult with another to see if you click better...but the best thing is to discuss your feelings of lack of progress with your current Therapist. Why not? You've hired them to help you. It could be that you are resisting working in therapy and can't go very fast??? A different T won't help that. Therapy is work, I can't imagine trying to work in two different directions at the same time (as would happen with 2 Ts)

be well.