1. You will first complete a brief online pre-screening. If eligible, we will request a HIPAA authorization to review your medical records to confirm eligibility. 2. If you are determined to be eligible, we will schedule you for a remote screening appointment with a study staff member (about 1 hour). If you qualify, we will collect electronic informed consent at the conclusion of this screening session. 3. Within 30 days after the screening appointment, you will attend the Carolina Center for Neurostimulation to have high density electroencephalography (HD-EEG) to measure your brain activity (approximately 1.5 hour session). 4. The following week, you will return for five consecutive days of PandA-tACS, scheduled flexibly around your availability on Monday through Friday. Sessions will take approximately 3 hours on Monday and Friday, and 2-2.5 hours from Tuesday to Thursday. During the in-person visits, you will receive active PandA-tACS for 40 minutes. PandA-tACS uses a weak electrical current applied to your forehead through electrodes attached with paste. You will also answer questions about depression, mood symptoms and mental health. 5. Two weeks after your last session, you will have a 45 minute virtual follow-up to complete questionnaires about your mood and overall mental health. 6. 4-6 weeks after your delivery, you will have a final 45 minute virtual follow-up to complete questionnaires about your mood and overall mental health.