Thank you for submitting your question.
I have seen very good results with Adderall in some of my patients with severe depression. Adderall is particularly helpful if your energy level is very low. However, you are on high doses of Wellbutrin and lexapro. You should not abruptly stop these medications as doing so can cause very unpleasant withdrawal effects. Also Adderall is not an antidepressant, therefore you most likely still need either Wellbutrin or lexapro.
You can discuss with your psychiatrist regarding weaning one of the two antidepressants and adding Adderall. I usually start patients on 5mg.
I hope this is helpful.