winniepooh,
Google the web to find more info. Think I should be safe...below is one of the info I extracted from the web..I just took another 5mg...anyway I emailed to Dr Loh also..still worry leh...hope everything is fine...
Folic acid
Folic acid (one of the B vitamins) is the only pre-pregnancy vitamin supplement that women who are eating a balanced diet need to take.
You need folic acid for the development of healthy red blood cells. Adequate intake of folic acid also reduces the risk of your baby being born with a neural tube defect, such as spina bifida. The neural tube develops very early in pregnancy, during the first few weeks after fertilisation. At this point, you may not have even realised you're pregnant.
It's important that you start taking folic acid supplements as soon as you start trying for a baby or realise you are pregnant. The recommended dose is 400 micrograms (0.4mg) daily, which you should take as well as meeting the recommended intake of 200 micrograms in your diet. Good sources of folic acid include fresh dark green vegetables such as broccoli, peas, brussel sprouts and chick peas. Many breakfast cereals are fortified with folic acid and it's also found in wholemeal bread.
A higher dose of 5,000 micrograms (5mg) of folic acid is recommended for women who have previously had a baby with a neural tube defect, are taking medicine for epilepsy, or have diabetes, thalassaemia or coeliac disease. If you have a family history of neural tube defects, then you should also take the higher dose. Speak to your GP about folic acid before trying for a baby if any of these apply to you.