Which one looks darker?

These probably aren't true positives. I took an ovulation trigger shot 8 days ago, and have just been curious about when the hcg in the shot will be gone. I am going to the store first thing this morning. I know I shouldn't waste my money. I have a feeling it will be significantly lighter this morning! If it is, I probably will wait at least a few days, until it is possible for it to be a true positive. The top pic is yesterday, and the bottom pic is from two days ago.