Pain...

So, me and my husband are trying to have another baby. I've been tracking my ovulation with opk well today I got mild cramps all across the lower part of my stomach and mild sharp pain in one side and then the other side of my stomach where my ovaries are. Opk said I'm ovulating. I noticed earlier today it looked like I had blood in my urine, well when this happen a little bit ago I was sitting very lightly. I'm a little scared this has never happen to me before. Anyone else experience this?