Is it normal to have belly pain?

I've been having pain all day in my lower back and in my lower abdomen it feels like a knife stabbing me. It hurts really bad and I talked to my doctor about it and she said it was normal but am I the only one feeling this kinda pain it's scarring me. I'm not bleeding or anything but it kind of feels like I'm going to start my period. If anyone feels the same can you let me know so I don't feel like I'm the only one.... Thanks