Hi, I Have PCOS.. I Lost A About 60 Lbs

Hi, I have PCOS.. I lost a about 60 lbs and for the last year I've been pretty regular (for the first time in my life ) about 26 to 32 day cycles. I'm still about 50 lbs overweight, and recently began taking hydroxy cut to help jump-start more weightloss. I've been taking it for about 2 and a half weeks and I'm now reaching 40 days since my last cycle with no real sign of cramping. I'm not pregnant. Is it usual for this diet pill ( and others) to cause me to miss my period? if I stop now, will this help? Or have I done damage?