Cm question

I have clear stretchy cm as soon as I get off my week long cycle..... For about a week and a half or two weeks..... Is that normal? I bought opk and every time I took one it would show a solid smiley. They obviously were defective. They were the expensive clear blue advanced ones too. So is it normal to have fertile ewcm that long. Also, when you ovulate do you still have ewcm or do you ovulate when the ewcm goes away?!? I'm supposed to start again on the 15th.