Question about clomid first time?

Hi I'm new to most of this I do have one daughter is who is 5 I had her when I was 22 I don't remember it being difficult to become pregnant then, then again I wasn't trying to concieve. My doctor gave me a rx for clomid I chose the generic form clomiphene citrate its 50 mg, I have actually had it filled for about 3 months yet and havent takin it. I want to start taking it my next cylcle which should be around the 25-27 of this month. For the last couple days I have been taking a multivitamin (centrum), folic acid 800mcg, fish oil omega 3 1000 mg, b-12 500 mcg. My husband has been taking the mulit-vit, folic acid, fish oil, and B12 as well. All of the things were mentioned above on the internet to prepare my body. My doctor recommended to start the clomid on days 5-9 funny thing is he is a new OB of mine and does not speak to well of english or I just can't understand him well. He didn't run any test I told him we wanted to have another child and he pulled out the rx pad. I didn't even know what clomid was until I came home and googled it that evening and I was a bit floored that he prescribed it to me without knowing much history. Anyways we have been having unprotected for the past 8 months with no results so maybe we do need it. Basically I'm on here for two reason first one for support from people doing the same as I, and adivice on clomid and its results. so I have a few questions that I would like to ask. First one is what days have better results? I've seen several and don't know why my doc said 5-9 without knowing much history or even my cylcle length. Is there anything else we can do to increase the result of clomid like robitussin, baby asprin, lubricants, ual postions and any other things ya'll might know. All these vitamins we are taking is that really linked to concieving or is it pointless. Also husbands father is a twin would that affect us? also I am a diet pepsi junkie started trying to drink more water but still crave my diet soda and drink anywhere from 3-6 a day will this affect anything? What time of the day is it best to take the clomid or anything else you reccomend I take? I think that is it for now and would have asked the doc all this but as I said couldn't really understand him. Currently I'm looking for a new Ob.Thanks ladies and good luck to you all. I guess learning the lingo here will help me to shorten my post how many days after taking clomid do you ususally ovulate, I have a regular cycle its been the same for a couple years I get my period around the 25th I wrote this on another thread but I think this one more relates to my question