Different test brands

Brittany
Has anyone had the issue where with one test it's very positive and with another completely negative...I tested two days ago with EPT(which is what I found I was preggo with my son) it was positive😜!!! however everyone says to test with FRER, but that test is neg. the same thing happened when I was preggo with my son. I had tested with frer and it was negative but the next day tested with EPT that was (VERY) positive went to the dr the next day and theirs was positive...just confusing...
It's making feel like something is crazy with my body....
Thoughts on brands of tests...
P. S. I am planning to test again in a few days with both just to be sure!