If it were up to me, I’d say she’s okay. The reason a S’fek S’feka works for S’fira is not because it’s an actual S’fek S’feka. If it was, then we wouldn’t be able to use it because we don’t say a S”S by making Brachos. Instead, the only reason we’re Machmir if you miss a whole day is to respect the Shittah of the Bahag, even though he’s a Da’as Yachid in this. However, since he’s a Da’as Yachid we let you continue to count with a Bracha whenever there is any second Tzad to say you can continue counting. (And I would certainly say that if she does the Eitzah mentioned in a few Rishonim (well, maybe it’s only mentioned in the Chinuch) on the next night to have said “Yesterday was X and today s X+1”, then without any doubt at all she’s okay.
And about the women not counting, that depends on what the Minhag is where, especially because the reason given in the Mishnah B’rurah probably doesn’t apply to a lot of women nowadays.