Home positives but doctors said negative..

Hello, this is my first post! I'm rather new here and I'm stressed out! Background info I'm 31. my so and I have a 12 and 9 year old girls. In 2015 I had a tubal and lost my right tube. In 2017 we had our beautiful boy. Our son sadly passed in a terrible accident July 2020. Also in July 2020 I had a miscarriage I was around 9weeks. In August 2020 I miscarried . I took a test Feb 12 just to be sure I could indulge for Valentine's day...it was a positive! Well I've taken 4 test and all positive. I went to my obgyn today to do their test and it was negative. Of course instant sadness. They told me to return in a week and test again. I'm super nervous as I've had a tubal and miscarriage So I took another test tonight when I got home and it's positive. I feel like it's a hurry up and wait game. And it's heartbreaking. Any have many positives then a negative then a positive? What's going on!