Depo Provera question

Ashlee • Mrs. Watts 💍 7/29/17 👧🏼 5/3/13 👼🏼4/1/17 My 🌈 👶🏼 3/6/19

How easy is it to get pregnant on depo provera? Back in April I had a miscarriage and after I was given the all clear I went on depo. Since then I have gotten my second shot In early July. Now I haven't had a period at all. But the last two weeks I have been getting symptoms, sore breasts, lack of sex drive, nauseated every morning, sensitive to smell, as well as a high pulse rate when not In motion, as well as feeling very heavy in my uterus. (When I was pregnant with my last child back in April, my resting heart rate was over 100bpm, like it is now) and ive been overly emotional. Is it possible I could be pregnant? Haven't taken a test yet only because well I dont have a period lol and don't know if it would be pointless or not.