What do think my chances are for this month?please need your opinion.?

hello i have been ttc for 2 months. i have very regular periods and i talked to my doctor about clomid to help me get pregnant. ok so i was wondering i am going to take my clomid on day 5 of my period and when it is time to bd i am going to start taking robitussin and use pre concieve lubricant. and i have been taking prenatal vitamins. what do you think my chance for conception would be like do you think it will be better?