Katia > Crying in the rain will do nothing except get you cold, wet, and most likely ill. First things first, get yourself up and get to the chapel. Once you get there, you can cry all you like, just don't stay out in the rain.
Second, this wasn't your fault. You were manipulated by a very powerful mage/alchemist, who has obviously done the same thing to others. You can make this right, but you have to get help. The chapel is a good place to start.
Third, once you've gotten this all sorted out, you have to start listening to the voices in your head when they warn you about things. Yes, that sounds odd, but think about it; they warned you about Sigrid, and they were right. She was evil. Next time they tell you to split, listen to them.