I think I know this too. It's awful to suddenly feel so exposed and vulnerable and then to understand that the only way to find peace is to stop let go of all the security we keep grasping at. It's sickening thought when you're in the grips of fear, but relaxing your hold on your material comforts and life and instead seeking God's will for you is the way to go. It does bring peace and a strange confidence. Be patient and trusting.
We are told so many times not to worry because God is with us and for us. It's hard, but once you ask Him for help and start trying to relax, it comes much easier. God wants you to trust and seek Him and will help you. Don't forget that nothing can rip you away from Him.
http://www.blueletterbible.org/morneve/07/0713pm.html Things don't always turn out as we want them to, but that they will turn out as God chooses them to. He knows what's best so much better than we do.
I frequently feel alone and in danger, particularly at night, even though I live with family. I get confused and scared and begin to worry about basic things. What really helps me then is to back off and remember that I'm here to live for God, not me. That get things back in perspective and relaxes that urge for comfort and a life I want.
Keep in mind that I'm addressing this as if you're not actually in danger but are still feeling scared. Obviously the above applies whatever the circumstances and if you're actually in some sort of danger, get help.
Already praying for you.
Piney.