Normal lang ba ang hirap sa pagtulovg kahit gabi or araw? 3 dys na akong nahirapan ma tulog. Why?

as per my OB .. kpg ng iinom tyo ng folic acid.. isa yan sa causing of insomia.. but its important to drink folic acid for the baby development... same tyo 13 weeks .. and hirap din matulog... sometimes i take 3mg melatonin as per advised by OB ...