I have post partum hyperthyroidism. i'm extremely symptomatic. my blood pressure is 90/60. the endo thinks it cld be my adrenals causing this?

Could be...: Based on that info, what I can say is that it's true that the functioning of the thyroid and adrenals are closely intertwined. The low blood pressure despite the fast thyroid make me think that perhaps there could be a component of adrenal hypo functioning along with the thyroid hyper functioning. Sounds like you need an intensive investigation.