prenatal vitamins giving me headaches

TTC for 2+yrs. I first took the gummy prenatal vitamins. Had no problems. but don't want to take them bc of the sugar. And the tablets have more folic acid. so I thought the tablets would be better. but I seem to be getting headaches by the second day. I have tried taking them longer but was just getting headaches. I always get headaches the week before AF. So I'm not be to getting headaches and I know it's the vitamins. Anybody else have this happen?