Loss of appitite on the pill (Enskyce)

Hi! So, I started taking the pill, Enskyce by the brand Lupin, 4 days ago. Since then, I've been experiencing alot of tiredness (in which I'm pretty sure is normal) but I've also had a huge loss in appitite. Since I started the pill, and during my PMS leading into my period, I've been having massive cravings. But, since I got on the pill, I still have those cravings, but I don't feel the urge to eat. Is that normal, and if so, does that fade in time? I've also heard that alot of women gain weight on the pill, but due to my loss of appitite could this mean I won't be gaining that many pounds? Thank you so much in advance!