Has anyone ever experienced the hook effect? Did you dilute your urine to reveal a positive test? If…

Has anyone ever experienced the hook effect? Did you dilute your urine to reveal a positive test? If so, how much lol? I ask because I got a very faint positive about a week ago, and now nothing (and still no period). I know I’m going crazy and googling and POAS like crazy. I tested 2 times on the 20th the first was negative (early afternoon) and then I took another that evening and it was very faint.. is it true your hcg levels can become so high a hpt can’t pick it up? My appointment isn’t for another 2.5 weeks 🤦🏻‍♀️😩. I’ve become a mad woman 🤦🏻‍♀️😪.