Help 😭

Okay so I am 4 months post partum. I took a FRER yesterday and there was a vfl. I’m freaking out because my baby is so young, so I went and bought a dollar store test to confirm. I see nothing on this! Am I freaking out for nothing? My period is supposed to start in 2 days. I’m so confused! I’ll attach a picture of my first test in the comments.