Pregnant or not ???! Frustrated!!!

I’ve taken 3 tests , the 1st one was taken on November 22nd , I went to a pregnancy clinic this past Monday the 27th and the nurse came in and said my test was negative 👎 WTF ?! I was shocked , she saw in my paperwork that I previously took a test prior to coming , and scheduled another appt for december 5th . Took another one yesterday and today still positive . Pictures were taken within the time frame as it only took a minute to pop up . Maybe a blood test should be done .