I've noticed that ever since my last period, I've been having these light cramps on my side (like when I'm going to start my period), but I'm not due for my period for another 3 weeks. My breasts have also felt a bit sore on the sides and my body has felt warmer than normal, but I have no fever.

Is pregnancy a possibility? Might be a pregnancy, might just be fluctuations in your hormones midcycle. Are you on any sort of hormonal birth control?