hi.. thans for using HCM..
you have undergone myomectomy, and now you have delayed periods..
urine prenancy test is negative..
get one serum HCG
for confirmation of pregnancy/no pregnancy..
see your gynaecologist for USG examination, and you may need a course of progesterone
to withdrawl bleeding, 3 cycles of OCPs to regularize the cycle..
all the best..