Namasthe Doctor I'm 37 Year Old Married Woman..dis Nov 12

Namasthe doctor I'm 37 year old married woman..dis nov 12 th i m getting normal period dec 16 there was light spotting for 2 days nd stop an 5 days after again light bleeding nd continue my gynaec gave me pause tab for stop bleeding ...period stop 5 days again spotting she priscribed primolute n tab 60 tab ..now 5 days course complete .there was light spoting again now pls suggest how to regulate my period...in pelvic ultrasound average bulky uterus...nd thyroid 6.67...cbc is normal