One positive one negative?

One test is faint positive and one is negative flat out. Has this happened to anyone? The Walmart one shows faint positive and pregmate shows negative? Any ideas? I tested positive Tuesday with the Walmart one and Monday the pregmate even had faint line. But now the pregmate isn’t showing any hint of positive. Hoping for my rainbow but if this isn’t it then it was t meant to be ❤️🙏🏽