St. John's Wort

Courtney • FTM preterm labor at 25 weeks. DOB 8/19/15 at 32w2d.She was in the NICU for 1m3d. She's now 17 months old!
Have any of you tried taking St. John's Wort as a natural alternative to prescription antidepressants? I starting taking it today but read it can take up to 2 weeks to start working. Would just appreciate some feedback firsthand. Thanks.