Ok ladies I'm cd 2 and have never used an opk but really would like to use them this month. I originally to Dtd once every 4 days then got to thinking that it could take a really long time ttc with that if I'm always several days out from my ovulation. So I'm thinking I'll purchase some internet cheapies and go from there. However, as I mentioned, I have never used them and I am nervous to try as I'm afraid of Dtd too early or too late. How do I know it's positive? I know the line should be as dark or darker than the control line but I'm afraid I'll think it's dark and Dtd only to find out it gets darker a few days later or think it's not dark enough and miss my window all together. Can someone give me some insight as to how this all works? Thank you ladies.

