Will my hormones go back to normal when my bump has arrived? ?

Well, there are other things that happen after you deliver - your body goes into withdrawals when those hormones start dropping which can include hot flashes (so much fun) and the same mood swings. You may still be sobbing then, so I really recommend you ask your ob/gyn about antidepressants now that are okay for your fetus and will be okay to continue taking after you deliver, because even pregnant women get depressed and depression during gestation can also be harmful.