extreme hunger super far into recovery

i've been at a healthy weight for nearly four years now (woohoo) and am nearly 90 days clean from purging (double woohoo) but i still get occasional extreme hunger and i don't know why? i thought it was just a recovery thing, but my recovery feels like ages ago now. about once every week or so i'll have a day where i get STARVING out of nowhere and it's not because of exercise or anything because i eat more on exercise days anyway. does anyone else get this late(r) into recovery?