HI DOC I AM TAKING DUPHASTON AS PER MY DOC

HI DOC
I AM TAKING DUPHASTON AS PER MY DOC ADVISE.BUT I GOT SPOTTING ON 19TH DAY AND 23 TH DAY FROM MY PERIODS.I HAVE IRREGULAR PERIODS ISSUE. AND AFTER TAKING THIS TABLET I HAVE SO MANY ISSUES LIKE SWELLING BREAST ,WEIGHT GAINING ISSUE ...TAKING THIS MEDICINE FOR 3 MONTHS..STILL I DIDNT GET PREGNENT ...PLEASE ADVISE IF I GO WITH THIS TABLET FURTHER...WILL I GET GOOD RESULT....I THINK I AM LACKING MY ENTIRE ENERGY...