Taking Lexapro 10 mg lamotrigine 200mg, seroquel 100 mg pregnant 5 weeks taking 1 prenatale and folic acid 800mcg is that enough folic acid?

More than enough. The CDC recommends that pregnant women take 400 micrograms per day of folic acid to give a 70% reduction in neural tube defects. They occur most commonly in the Irish ethnic population. You state that you are taking a prenatal vitamin. It probably contains the right amount of folic acid in it. Check the label and if it does then you can stop taking one of your pills!