Do pms mood swings reflect mood during pregnancy?

right before i get my period, i have one day where i get really depressed and senstitive, as a lot of girls do. i am just wondering if my pms mood reflects how i will feel when i am pregnant. the pms mood is a result of the high levels of estrogen and progesterone right? so since those hormones are still at a high levels during pregnancy, does that mean you will react the same way?