Explain -- are you self-medicating with someone else's meds? Because if this was prescribed, I assume you'd be able to ask your doctor or psychiatrist. Both meds can be very stimulating, take a few weeks to take effect, but can have side effects immediately. Pristiq can be very hard to stop taking if taken for awhile. Don't self-medicate. If it's an emergency, go to the ER. If it's not, it will pass. If you're not having fun, do something fun. There is no "supposed to be" in emotional life, there just is.