Hi, I'd Like To Have An Answer Maybe. Ive Been

Hi, i'd like to have an answer maybe. Ive been havibg some weird pain on the one side of my abdomin it felt swollen, then When I started my period I noticed a funny smell more like death of which normally my period blood never smelled bad. I had gone off my period but there's still that funny smell that my discharge has a little bit of very light yellowish clear colour, somehow I think it smells like pus to me. What could be the cause of it because I haven't been having a smelly discharge ?