Pregnant

Hi ladies! Hope everyone is have a great day! Um I have a question and hope some one out there can help 😂. I have been feeling so just off lately. I thought i was just stressed but then when I started sleeping a lot and being exhausted all the time I thought it was time to take a pregnancy test. I took one first thing in the morning and it came back positive! I was shocked because I am on birth control. But it made sense with everything that I am feeling. This isn’t my first pregnancy and I am used to those early signs. So I went back to take more later that day and it came back negative. I am confused because I don’t know what to think. And I was just wondering if anyone had experienced this before?! SOS lol