I took a first response test and it came out faint line so I decided to take a another one and it came out faint again but little darker. I decided to go to the clinic to get tested today and it came out negative but I missed my period and something wasn’t right so I decided to get a another test the same day and it came out positive but a darker line this time. I thought I was tripping so I had my sister take one and it came out negative. What should I do? Believe the test or the clinic?