the depo takes a while, sometimes upto 2 years in some women to get out of their system but not everyones the same, i wish they'd bring out a pill for men instead of us women putting up with side effects
i highly doubt your pregnant, the switching birth controls is what is throwing off your symptoms. plus it normally takes awhile to conceive after depo, not to mention you were still on bc after you stopped. esp if a blood test is negative, your body just needs time to adjust.