hi.. you were on IUCD as a birth control.. now switched over to progesterone
patch. it is common to have intermittent bleeding when you are on progesterone... usually this withdrawl bleeding is painless.. see your gynaecologist to rule out any other causes for pain.. get one urine pregnancy
test done... because ectopic pregnancies are common after withdrawl of IUCD and on progesterone. all the very best.