When we went to our first prenatal checkup, the doctor told us that in the first 3 months, just taking folic acid is enough. she said 3 months onward start taking more supplements (she didn't tell which ones just yet).
She also said something else that's interesting, she said if you can't remember if you already took 1 pill of Folic Acid, just take another one. She said it's hard to overdose so it's better to take 2 pills a day by mistake, than take 0 pills.