Prenatal supplements and milk?

Hi! I am 10 weeks today. Had a lot of conflicting information from doctor and nurses and friends and networks on supplements. What do u follow? Taking folic acid 500mg/day through Blackmore prenatals (which included vitamins) since week 5, gynae says only folic acid needed for first trimester Since week 9, was asked to take fish oil/ DHA. Got pregnancy fish oil from gynae but they cost a bomb and no idea if the normal fish oil would be good enough. Heard that fish oil was only needed for trimester 3 but also learnt from others that they take it throughout. Wondering if I should be just taking my Blackmore throughout my pregnancy with fish oil. Will there be any issues if folic acid is taken in second /third tri since they come tgt in Blackmore? Any folic acid overdose problem? I learnt about obimin but was not given any. What about pregnancy milk? Are they needed? I am not a milk drinker so I take it through my kopi -C siew dai.... Advice anyone? Thanks!!!