What Causes Difficulty In Conceiving Despite Taking Fertisure?

Hello Doc, I am on the verge of completing my 27, got married in Dec.2013.Me & My husband used precaution for 4-5 months initially.The problem is that I went an irregular Menses from October 14 onwards,I consulted Gynecologist had PCOD tests,T3,T4,TSH,FSH/LSH ,serum prolactin tests.All are normal just the thyroid is not detected but was on higher side.I am trying for conceiving also but not striking it.I don t have any child yet.Now,the another Gyni suggested me for Fertisure F,Aloes compound alarsin,Amycordial cyrup,Belong-F for treatment & asked me to give her 3 months from now. I am little skeptical about conceiving part, because my parental side all Girls had there kids after 13-14 years after so much of medication or either they didn t conceived ever.Please suggest.I am so much worried. Regards, Viewer.