Random sleep regression

My daughter will be 3 in Feb and has been, up until now, an AMAZING sleeper.. In the last 72 hours, she's been LOSING it at bed time. She throws tantrums, knocks on her door and will cry for hours and hours, only thing that's been calming her down is coming into bed with dad and I... Has anyone experienced a 3 year old sleep regression?? and HELP if so.