What is going on?

Coco • 👰🏼 2017.06.03 👶🏻 2018.08.20 👶🏻 2020.04.18 PCOS / PREEMIE Momma Pregnant with a “surprise baby” #3 after infertility 🤰

So I took a clear blue preg test yesterday and it had a faint line so I tested again this morning. There is still that faint line but I’m fairly certain it hasn’t gotten any darker. I’m not convinced it is anything. With the same urine this morning I took a first response and there was no line at all? I’m not sure what to think any advice/ ideas? 🤔