This clinical trial aims to determine if Transcranial electrical stimulation by direct current (tDCS) and transauricular Vagus Nerve Stimulation (tVNS) treatments are effective in reducing stress symptoms, distress and improving sleep quality in adults. The main questions it aims to answer are:
* Determine if tDCS effectively reduces the intensity of stress symptoms in adults.
* Determine if tDCS is effective in reducing levels of distress in adults.
* Determine if tDCS is effective in improving sleep quality.
* Determine if tVNS is effective in reducing the intensity of stress symptoms in adults.
* Determine if tVNS is effective in reducing levels of distress in adults.
* Determine if tVNS is effective in improving sleep quality.