I am on the depo shot and haven't had a period but having pregnancy symptoms. I took a test but it said negative.. I haven't had a period in 2yrs so I wouldn't know when I was pregnant unless the test told me.

If you have been getting the injection on schedule, odds of pregnancy are quite low. If you have been late on some, it goes up a bit. Since you can't go by a missed period, and the test you took said negative, you could always ask your doctor about having a blood test done to alleviate your concern.