Confused, help?

Vanessa
I took the top test yesterday morning and it seemed to appear that there was something there, I took another test today shown below and it doesn't look like there's anything on it at all, it looks like an indent line on the one from this morning. I'm so confused, I've been having cramps for the past week and a half like I'm going to start my period but I never do.. any help would be great.