Hi I've been useing cheap OPKs this month. Just cheap ones from amazon. I started them on CD9 and that was the strongest line yet but I still wouldn't say completely positive. Since then they have gotten weaker and today CD14 and it was weakest one yet. I take them at the same time every day at 8pm after 4 hour hold and no drinks. I'm kinda hoping I did ovulate early and my husband is away for the weekend so we DTD early and hoped for the best. Is it normal to ovulate on CD9?