Hi, Thank you for using HCM. Urine pregnancy test can come negative very early on after delayed cycles. Hence it cannot be a definite confirmation for a pregnancy. There is a test called SERUM HCG which is a blood test and that is a definitive test to determine pregnancy. Please get that done before you take any medications. Folic acid is basically a type of vitamin that is good for the babies nerve and brain developement hence it is often started when one plans to concieve. However this has nothing to do with your cycles. I would like to know your age, your cycle durations and regularity whether its normal or irregular, your weight, if you have ever got your thyroid hormone tested if yes the report and how long have you been trying to get pregnant. Please answer these queries so that I can advise you better. On the whole if you have not been trying over an year and you have no other issues with your cycles I would urge you to please be calm and try by natural methods until a year. I know fertility issues can be anxiety provoking but being stressed wont help either. stress levels can also affect conception. Please take care. Hope I can be of further assistance to you.