Would you be freaked out, worried, or scared if someone said this to you? Would you worry about jail time?

You are in HUGE trouble already buddy. Oh and the cops likely forwarded the info to the FBI if they haven't come to you. Having child besides the pictures will be adding to the trouble. Oh don't bother to delete it, the cops can use programs to bring stuff back out after you delete it. Actually the reason the FBI would be getting involved is to get easier access to your email. Don't worry it will still be on the email's servers even if you delete it now. If she already contacted the cops they already talked to the people who run the email. Best you can do is hope she had something to do with what was being done to your account so you can try to get her in some trouble. I'd be getting a lawyer and hoping they will help you, as well as contacting facebook about someone messing with your account.