What Causes Nausea, Moodiness And Vomiting After Restarting Depo-Provera?

hi I was on the depo shot last summer, got it once then stopped BC I was no longer sexually active.. o recently start being active again so I got back on the depo yesterday & I've been moody and feeling nauseous & this morning I wokeup throwing up iknow I'm not pregnant BC I also got a pregnancy test yesterday & it was negative .. is the throwing up normal?