Appetite suppressant on period

please could someone tell me if it’s the same for them or not but when I inject the week my period is due the appetite suppressant part of the drug doesn’t work? I eat way more than I usually would. I’m not mad about it as I’m still losing but just wondering if I’m right and/or if anyone else experiences this? I feel like with this drug it’s nice to get reassurances from the community - thanks all