Hi E.! My daughter and son were both unplanned as well. Since you are however trying to plan this pregnancy, check out http://www.americanpregnancy.org/gettingpregnant/ovulatio... and use their ovulation calendar so that you will know when you're ovulating and most likely to get pregnant.
Definitely take prenatal vitamins that have the research recommended dosages of folate to help reduce the risk of neural tube defects and iron for optimum health during pregancy, a blend of calcium, plus magnesium, phosphorus, and vitamin D to strengthen bones and reduce the risk of osteoporosis, and DHA and EPA essential fatty acids from fish oil that are critical for brain and eye development and help support healthy cognitive development of prenatal and nursing babies. I used these with my son (didn't know about them with my daughter) and my health and energy was off the charts! Send an email if you'd like to know where to get them in your town to ____@____.com
My other advice is that after you find out when you're ovulating try not to be stressed about it, you're newlyweds, full of love so just make it! If after using the ovulation calender a few months and you still don't get pregnant I would speak with your gynecologist and at their suggestion a fertility specialist.
Happy family planning!;)