My daughter is 19 months old and refuses to go to sleep. I've looked it up and all signs point to a…

My daughter is 19 months old and refuses to go to sleep. I've looked it up and all signs point to a sleep regression but most everyone said their little one would only cry 20 to 30 minutes then fall asleep. My daughter will cry for hours if I let her. Her bed time is 7 and she is still up at almost 12:30. Has any one else had this happen? I have tried everything. Orajel in case it's her teeth, Motrin as well. Bath time with lavender soap. A lovey, a night light, a noise machine, and making sure she gets plenty to eat. I am so exhausted.