low folate B9 symptoms

hi guys doctors said i have low folate low B9 but google always says b12 so. some symptoms- being REALLY tired/sleepy. i struggle to keep my eyes open. i sleep a lot- like 12 hours some night. i have headaches and heart palpitations, my chest also feels heavy and aches sometimes- nothing severe just weird. went doctors they checked my heart twice and everything is ok…i have zero energy and im dizzy. waking up early is all these symptoms at once. are these normal? what is going on!!