At my wits end

Amanda
My daughter is 5 months old and will not nap or sleep at night. She maybe naps 15/20 min at a time if that twice a day and will CONSTANTLY wake up at night just for a pacifier. I have tried everything. Literally everything from black out shades and curtains to sound machines and making sure she is super full before going down. I have tried getting her on a schedule but it's hard because sometimes she will not sleep. I have tried the cry it out method but she will just cry until she gets so worked up she gets herself sick. Does anyone have any suggestions? I did bring it up to her dr and she didn't seem worrie but I'm exhausted and the baby is cranky because she's tired but won't sleep.