Depression...

I need some help. Im 34 weeks and have realized i have what seems to be depression.. I used to have it before when i was in middle school and got help and have been better until now... My first pregnancy i didnt get PPD.. Im scared on how this is gonna affect me. I wanna breastfeed and be happy again. If its just hormones now, could i get Postpartum Depression?? Im seeing my ob in 2 weeks and will discuss it with her then but im in need of some help and advice please ladies...