Help please Sleep issues continue

Domenica

Baby girl is almost 18 months and has been having sleep issues since October. Since October she has had all four molars break through and is definitely going through separation anxiety with me. Some nights she sleeps through the night other nights shes up and needs atleast 3 hours to fall back asleep. I dont know if i should rock her, let her cry it out, mix of both. Please any advice or personal experience is appreciated.