melatonin during pregnancy???

Tanya
Okay, so I am 14 weeks pregnant....I have been taking melatonin for over a month....just went and purchased another bottle and went to take mine for the night and just wanted to read the label....it says it's unsafe for pregnancy???????????? Have I harmed my baby?????????? Should I call my doctor tomorrow????? This is my 2nd child....I'm so worried😞