What made me test?

Hi, I’m Brianna 18 year old. I practically have s3x 3-4 times a day with my boyfriend. This is clearly a relationship I want but we aren’t ready for kids. I was 1 month late for my period. All I wanted to do was eat and sleep.

I got 2 positive test, lines clearly show. I was super excited but scared. I took 2 from cvs and they said negative. I was really sad. My boyfriend ended up taking me too the doctor and they said I wasn’t pregnant but couldn’t give me any explanation for the 2 positive.

If anyone could give me any advice or anything about pregnancy test and what’s the best to use to get the best results I would appreciate it