Line progression? Chemical?

Ke

My first transfer in May ended in a chemical and my tests didn’t get darker, so I have really high anxiety this transfer. I tested Tuesday night at 6dp5dt and last night at 8dp but my line doesn’t seem any darker. Shouldn’t it be getting noticeable darker every two days? I know it’s really too early for symptoms but early in the week I had a lot of hunger and a heaviness/stretching feeling in my uterus and those both seem to have gone away. I’m really scared we’re back in the same boat we were in in the spring. My beta isn’t until Monday - such a helpless feeling.