Hi mama! Yellow sa nails/lungad can sometimes happen, pero since first time mo and baby is only 2 months, better to check with your pedia para sure lang, kasi it could be normal or kailangan lang ng attention depending kung ano talaga ang nakikita mo. Some of my mum friends' babies had it din and turned out okay, pero walang bad sa validation from your doctor especially while baby is still so young! Let us know what pedia says, okay?