Why so light

Jeneba

So I’m 5 weeks 4 days. The first test is from 2 days after missed period. And he other 3 I literally just took. My doctors appointment isn’t until a 100 years away as it feel so I tested to see if it’s getting darker. The second pic you barley see anything and the other two are darker. Shouldn’t it all be darker. Is it cause I didn’t take it with FMU? Or should I be concerned about my levels not getting higher?