Compare: 否 vs 否

「腰(#1288340)は痛む？」「いや、別に」「そう、それは不幸中の幸いね」

"Does your back hurt?" "No, not really." "Oh, that's something then, isn't it?"

もしかしてツンツンしているのは、生理痛なだけとか？いや、まさかね。

Could it be that her prickly attitude is just because she has period pains? No, couldn't be.