Why does the questioner feel unhappy and find no joy in life despite her conviction that she left something for Allah, and is her decision to return from emigration the correct one, and why does she not feel the blessing of leaving this matter?

You have done well by returning from the lands of disbelief, as they pose dangers to a Muslim's religion and worldly life, especially for a girl. We advise you not to pay attention to anyone who urges you to return. You must have good faith in Allah, for whoever fears Allah, He will make a way out for him and provide for him from where he does not expect. The Prophet, peace and blessings be upon him, said: "Indeed, you will not abandon anything for the sake of Allah except that Allah will give you something better than it." Allah may save some of a person's worldly reward for the Hereafter, knowing that this is more beneficial for them. Among the reasons for relief from worries are frequent prayers upon the Prophet, peace and blessings be upon him, patience, keeping company with righteous women, and attending gatherings of knowledge and remembrance.