Is it possible for a guppy to get impacted with fry? I've had mine for about a month and a half now, and she's had the black gravid spot the whole time, but hasn't had any fry. I even put her in a seperate tank with some fluffy plants and she didn't do anything besides get depressed.

Maybe she's sterile...

Still nothing. She looks very uncomfortable.

Um, is she really fat, like is it obvious that she is really pregnant with fry, because if she is really pregnant, you can easily tell by their belly's. Sometimes it takes a while for them to have them, but maybe turn the lights off a lot, and she might feel more comfortable having them. But goodluck.