PLEASE HELP!! Is this test invalid???

Hi,

Can I please ask for honest advise. Should I retest again as to me the red line does not right? Could I be wrong and the test is negative? I am having cramp to no cramps and cramps again. Period due today but nothing has shown up?

I had a lot of water to drink before I went to the ladies. (Sorry for the word) my pee was dark enough to test. I’m not sure if the test picked enough pee up cus of how the test looks? Should the background b that white clear...

Please help xxx