Well, she does still care or she wouldn't bother questioning you. But it's kind of like....she doesn't want you right now, but she doesn't want anyone else to have you.
The next time she flies into you with this type of conversation, you must learn stick to very short answers and do not ask her any questions that would prolong the conversation. You do not have to give her a play by play of your activities. If she thinks you're not telling her everything or that you are not being honest....that's her problem, but don't try to convince her.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!