Kindly refer to the following link(s):
The sweetness of Iman | Assim Al Hakeem (1 hour video)
How to keep faith in tough times?
How can we think positive of Allah when times are bad (MUST WATCH)
Reciting Ayahs of Sakeenah (Tranquility) at times of distress
Fearing of hellfire due to many sins & feeling despair of Allah's Mercy