What did I excpect?

Hello r/gay, I'm 17 years old and today I came out to my mom, shes Christian but I thought that mayby shed accept me for who I am, wrong. I had already told a very close friend(who happens to be a girl, 17) whos also Christian, even so much so that she switched to a baptist church and got herself baptised again. She accepted me for who I am and I guess I expected my mother to do the same. But she started going on about how being gay is so sinfull, and that shed pray for me not to be gay. She said that this is a real test for her faith. This off course has a reason, when she was doing her study(to be a nurse) she often got confronted with gay people, eventually they started talking about it and she said she put a destinctive difference between having gay feelings and being a homosexual. Even though for me those 2 go together if I'm in a relationship with a man.Is this just the initial shock, or should I be worried that this might stick(which is what I think).Any help/suggestions would be nice, because after the talk I had with my mom I just don't know what to do anymore...