mine looked like that as well and they were postivie. But take another to be for sure. God Bless!
Do another to be safe. If it comes out the same way. I'd say go to the clinic too
Looks like an evap/indent line because it had no color. If it was positive it would definitely have color.
*to me it looks like an evap. I would say test again in around 3 days. I got a super light positive around 7dpo but I waited until 9dpo to believe it.