pregnant miscarriage clots

hey i am on depo-provera and it was my first injection, i didnt have it straight after my period as was in a rush to get it over and done with and 2 daysafter having the injection had unprotected sex.
after i felt pregnant, even though i know its a side effect of the injection, this happened around 2-3 weeks ago, i had a few drops of blood tht i assumed meant i wasnt pregnant but it stopped so suddenly yet wen i wiped myself there wud be a tiny bit of undiluted blood. the past few days i had been getting belly pains on and off and tonight i have had (at 2 seperate tyms) blood clots come out of myself tht seem to be covered in a whitish jelly mucus discharge thing, what could have happened? have i miscarried or is this normal?