As for the question about a du`a for removing stresses, the Prophet (peace and blessings of Allah be upon him) taught us a du`a’ by which we may ward off worries and distress. Ahmad narrated that ‘Abdullah ibn Mas`ud said: The Messenger of Allah (peace and blessings be upon him) said:

There is no-one who is afflicted by distress and grief, and says: ‘Allahumma inni ‘abduka, ibn ‘abdika, ibn amatika, nasiyati bi yadika, madin fiyya hukmuka, ‘adlun fiyya qada’uka, as’aluka bi kulli ismin huwa laka sammayta bihi nafsaka aw anzaltahu fi kitabika aw ‘allamtahu ahadan min khalqika aw ista’tharta bihi fi ‘ilm il-ghayb ‘indaka an taj’al al-Qur’ana rabi` qalbi wa nur sadri wa jala’ huzni wa dhihab hammi (O Allah, I am Your slave, son of Your slave, son of Your maidservant; my forelock is in Your hand, Your command over me is forever executed and Your decree over me is just. I ask You by every name belonging to You which You have named Yourself with, or revealed in Your Book, or You taught to any of Your creation, or You have preserved in the knowledge of the Unseen with You, that You make the Qur’an the life of my heart and the light of my breast, and a departure for my sorrow and a release for my anxiety),’ but Allah will take away his distress and grief, and replace it with joy.” He was asked: “O Messenger of Allah, should we learn this?” He said: “Of course; everyone who hears it should learn it.” 

Also, Anas ibn Malik reported that the Prophet (peace be upon him) used to say:

“Allaahumma inni a`udhu bika min al-hamm wal-hazn wal-`ajz wal-kasal wal-bukhl wal-jubn wa dala` ad-dayn wa ghalbat al-rijal (O Allah, I seek refuge with You from distress, grief, incapacity, laziness, miserliness, cowardice, the burden of debt and from being overpowered by men).”