Why is this????????????????

WHENEVER I GO TO BED AND ALL IT TAKES ME A LONG TIME TO FALL ASLEEP AND I HAVENT BEEN FEELING GOOD LIKE SHARP PAINS AND CRAMPS AND ALL AND FEEL LIKE I NEED TO THROW UP AND WHENEVER I STAND UP I GET DIZZY I HAVE HAD SEX AND ME AND MY BOYFREIND BROKE UP BUT I WONT EAT MUCH AND IM GETTING A LITTLE FATTER WHY?