So after a week of waiting to finally test (day two of no period), I finally go out and buy a test.. and guess what.. it’s invalid! No lines came up at all and I’m so annoyed lol. Is it just a bad test or was it something I did wrong? I peed in a cup and dipped it in.. It was a first response test btw. Can anyone recommend a good brand? (Ik first response is usually good but I’d rather try out a different brand this time)

*I held the test in for about 15 seconds.