12days past ovulation

Hey guys I'm 12dpo, I've been getting super tired, having weird discharge, had mild cramps but today I had some really sore cramping but it went away like after 20 minutes, my boobs started hurting yesterday at 11dpo and feel so full! I keep feeling sick after eating, it's all so strange! Does anyone know what could be going on? Any help would be so great full I'm 18.