Is this possible

[pochontis]

One day yes next day no

Do you mean getting a positive test and then negative a day later?

Yes it won't let me show u don't know what I am doing wrong

Did you test at the same time each day? Was the positive very faint?

Positive digital

I'm attaching the photo it just won't upload

Same time in the morning

Digital tests aren’t that sensitive so it could just be that you’re really early and the urine you had for your second test was more diluted.
Buy a FRER (first response early result) and try again :)