Will allah(swt) forgive sin?

actually in my past i have done sins as the results i had being facing lots of problems in my life. now i realise that my sins was the cause for the problems so i repent and asked forgivness with allah(swt). i knew that allah(swt) is most merciful. but i doubt whether allah(swt) didnt forgive my sins because still i am with same problems to mention clearly i am worst then b4 so when will allah(swt) forgive my sins? and how can i get sign from allah(swt) that my sins have been forgived???? PLS