Rapid weight loss but not trying is something wrong ?? ?

My son will be 11 months on the 6th of June 2011 n I was 250 when he was born as of today I'm 184 last week I was 194 and I'm not dieting need to but don't feel it should go this fast .. My pants are huge I tie them with string .. Everyone is connoting on it... I'm stressed a lil with court over my dughter but not bad.. On may 18 th I went to hospital with vomiting n diagrams my calcium n alp was high. Is something wrong with me ?