Need advice please

Hey ladies , sooooo I for the first time in three years I missed my AF on the 3rd of this month. I waited until the 5th to test and it came up super super faint ! I tested the next day and I got the digital clear blue it said pregnant !! So today I scheduled an appointment and my test was negative at the office ! I was so heart broken ! I went to the store after and bought two more tests and they look more darker then the other day ! I’m so confused has this ever happened to anyone