First hpt was positive next one was negative

Sydney
Hey everyone. So I took a HPT earlier this week and it was positive. My husband and I were totally stoked but in a bit of disbelief so I took another one the next morning to verify and it was negative. Obviously I went from total excitement to complete heartbreak. Doctors office said give it a few days and take another one. I have so many symptoms but I have no clue what to believe. Has anyone else had this happen? I'm hoping you guys can maybe give me some insight....