Medications in general affect individuals differently, so one person's experience won't match the next person's. That particular medication has a very poor track record of working, but maybe you're one of the few it will help. This is a drug that supposedly works quickly, as opposed to purer antidepressants that take 4-6 weeks to start working, but as it does have some effect on serotonin it might take awhile to work. Increased anxiety is a common side effect of any medication that affects brain neurotransmitters. Sometimes it's a start-up effect and sometimes it's a long-term side effect. Only time tells us that.
I am currently on Duloxetine as well. She prescribed me xanex to go along with the Buspar.