Update: Today Sunday she woke up better, no dropped wings and not so slowly, she kept staring at the nest and I give her enrofloxacine and then she went there, after 30 min she was still there, so I came back one hour more later and I've found a broody pullet(not her) and below her there was an "rectangular" shaped egg, so I think if it's her egg, she used to lay more pointed eggs that their sister at the beginning of laying so I always recognize them but the last ones before going broody they were like the others. The right one in the picture is the egg, the other ones is her sisters for comparison, I think in real life the difference is more clear, the half above part looks the same as half below part (for me).