Im 38 and 5 weeks pregnant!

Im 38 and found out im 5 weeeks pregnant! woohooo! i had one son from my previous marriage and 3 miscarriage with my new man...weve been trying to get pregnant for 7 yrs! im beyond excited and scared... as we age we become more sensitive and we need to be very careful. Im starting to take my prenatal vitamins. I would like know what are the food yoy eat and vitamins to keep your baby healthy in early stage of prenancy?