Missed period. Tab ovacare is it fine?

I am 29 yrs old girl unmarried and not sexually active..I usually have 35 days of cycle..so in November my period came on 9/11 thn in December it got late so I got usg pelvis cbc and tsh done on my docs advise all were normal than period automatically came on 45 the day of cycle..then in January it came on time..in Feb I took primolute n on my docs advice as I had to got out..in March as I left tab on 9/03 my period came on 11/3..in April May b due to effect of tab it came a week earlier in 6/04 now in May again it got late it should have come by 11/05 but today it's 47th day of cycle it didn't come I again got my self tested my usg pevis was normal cbc normal tsh was 5.8 but than as per my docs advice I got my free tsh done which was normal..I consulted my doc she said it's due to effect of pills I took primolute n it's not safe n all and she prescribed tab registrion for withdrawal bleed and tab ovral-l to regularise nd tab ovacare is it fine?plz help me and advice