What Causes Stools To Smell Sweet?

Alright. It s gross, but here goes. A while back I was constipated, so naturally my grandma suggests prunes. I had some (like 5) every three or four days for like a month. Weird thing was, at the same time my poo started smelling sweet. (No joke.) I put it off as nothing, figuring it was the prunes, right? Well, it s been like two weeks since I ve had any, and I ve been having normal BM s since then. But today it randomly smelled sweet again... but with like a weird sickly undertone. Also, I feel kind of like weak and shaky today. Is this serious? Could I have high blood sugar or something?