Yesterday afternoon I tested and got a VFL on a rapid result FR test .. then this morning @ 5:30 am I tested with the second one and received another faint line but darker..

Then I took an hour nap and retested and it appears to be negative...? (Wasn’t the rapid result FR it was a regular one)

Is it because my U wasn’t held enough ? I’m going to retest with the FR digital in the morning.. just want to know if anyone experienced this ..