Nursery's traumatized Eden

My sweet Eden has finally turned 18 months and I've been so excited for her to start nursery at church. She's been a very difficult baby/toddler and I just want one week where I can actually listen to a lesson in Sunday School or Relief Society. For months she's been begging to go in the nursery room and play with all the kids and toys. Well, for some reason she must know that at 18 months she goes permanently. Today I'm walking down the hall and get close to the room and she clenches onto my shirt and starts freaking out. I can't even walk in the room and she's already throwing a fit. I finally get her calmed down and try to leave. I get around the corner, down the hall in the Relief Society room with the doors closed. About 2 minutes later I can hear her screaming from all the way in the Nursery room. I run in there and she latches on for dear life. I get her calmed down, playing with toys and try to sneak out again. I don't even make it 30 seconds before I can't bear to hear her screaming anymore. I end up staying all of nursery with her and when it's over I have a scout meeting. I go to pass her off to Bryan and she freaks out again. All day she's been my little shadow and then at bedtime she freaked out again. She never cries at bedtime and today she screamed for 15 minutes before I gave in and picked her up. She cuddled into my chest and just whimpered like she was terrified. It broke my heart. My sweet baby thinks I'm going to leave her. I don't even know if I should attempt nursery again.