What Causes Breast Tenderness And Low Libido After Taking A Nur-Isterate Shot?

hi i just had a my first shot of Nuristerate injection and had unprotected sex almost every day after 7 days of waiting period after the shot and now i was supposed to go for another shot on the 23rd of September and i did not because i am gaining weight but now its been 10 days and i have been having protected sex but i am feeling tired everyday ,sleepy also and my breast are tender and painful on the nipples so could i be pregnant coz i am also moody and do not crave sex anymore and i am always fighting and emotional.