Welcome Indiana.
Fear and guilt are very normal at this stage.
You need to read more about Islam with an open mind. Read online discussions with different opinions and see what makes sense to you. It may help if you put in your mind the possibility that all prophets might be just ordinary smart people who did what they did for their own reasons (whether it's good or bad)
If you get the impression that online sources may not be all true, as you will hear from muslims if you try to discuss the matter with them, you should read offline books (The prophet story, ghazawat (Muslim's wars -not sure about English translation), revelation order and reasons for Quran, etc.).
View Hassan's videos. Here is the link.
http://uk.youtube.com/user/discussislam. I'm sure they would help you a lot.
Then decide for yourself what makes sense and what doesn?t.
Also, lots of great members here can answer your religion inquiries.
Good luck and welcome to the forum