Hey Jaxi! I've been breeding swordtails for about 2 years now and she definitely is pregnant (or gravid, as it is in fish). The males are fighting over her and swordtails are known to be especially aggressive without enogh females. And livebearers have been known to "harass" the females to death. (Although I've never witnessed that.) I reccomend you either return a male, get more females, or all of the above. The choice is yours, though, as I've never witnessed anything serious result from their squabbles.