Only you know those answers. I can help guide you into finding the answer, but I cannot answer it for you.
Recent death of a loved one?
Stress?
Recent break-up?
All of these can be contributing factors in changing a person. All in all it leads back to trusting God.
Quote
Proverbs 3:5-6
New International Version (NIV)
5 Trust in the LORD with all your heart
and lean not on your own understanding;
6 in all your ways submit to him,
and he will make your paths straight.