Is it happening?!

Im 5 days before AF is supposed to arrive.

Last night I had a glass of orange juice and instantly got heartburn and I thought, the last time that happened I was pregnant..

This morning I took a FR early result 6 days sooner test and before 3 mins was a wonderful 2nd pink line appeared.

I bought 2 more tests but they're not early response and I used the same pee to test immediately after and no line. Could I still be pregnant even though the 2nd test showed nothing?

Im kicking myself for not buying 2 early responses.