It's a good thing you got closer to God, He'll carry you through the good times and bad. Don't stress about not being able to write, it may take a while but you'lll get over it.
Well, look at the lyrics to your favorite songs. Secondly, glance around at the nature, and compare that to how it makes you feel. Take advice you once recieved... All of these are possible ways to make into an inspiration. But I like what you said, it might be something you have to get out. Try reflecting on that.