I'm almost 100% positive this one comes from the mid-late 1970s.
The story starts off in a crowded elevator, with the protagonist (a young woman, probably in her early 20's) fretting about various things. She's chiding herself for having garlic bread with her lunch, as she's feeling a bit bloated and is sure the other passengers can smell her garlic breath. She is mortified when she looks down and notices her ugly big toe has pushed through a tear in her pantyhose. That sort of thing.
She gets off at the floor where the therapist she is going to meet is. As mentioned before, the therapist is actually a computer programmed to counsel people. A series of Q&A's between the woman and the computer ensue. IIRC, the course of the conversation becomes somewhat comical, and the computer-therapist becomes a bit perplexed at some of the responses.
The woman leaves the session feeling great about herself. The things that bothered her previously she now sees in a positive light. Her exposed toe is akin to a blossom pushing up from the earth and showing itself (or something like that). In the elevator down, a handsome man next to her notes she had Italian food for lunch (due to the garlic breath). She flashes him a smile, says "you should try my lasagna", and suggests a dinner date.
Meanwhile, in the final paragraph, the computer-therapist is going through a litany of humorous self-queries, all of them indicative of newly-found insecurities. The healer has become the patient, so to speak.