Is it safe to switch from one birth control (lo loestrin fe) to beyaz, (drospirenone and ethinyl estradiol and levomefolate) then back to lo lo? I'd start my new pack tomorrow.

Shouldn't. If the composition of both is exactly the same, it might be possible; since it's not, your cycles may be irregular for a few months & u may not be fully protected & would have to use a back-up contraceptive method. Discuss with your gyn or pcp why u want to switch back & forth.