This is the first time I am ttc so I'm really new to all of this... I took an opk at 9am and it was negative. Then before I went to bed at 11pm i took another and it was positive. I took a second test because I was having pinching by my hip and in my back. I also had some CM that had a string of brown blood. Today I have more brown blood (light bleeding) with pinching to the point I can actually say it hurts. is this normal during ovulation?