Yet another story search

Looking for a story. A boy is diagnosed with low testosterone and the doc gives him a booster shot to jumpstart his puberty. Leaving the office with his girlfriend he goes into anaphylactic shock. His GF quickly summons help and they are able to save him, but now he is totally allergic to T. I think the GF is the daughter of the doctor.

There are plenty of stories that use this premise, but only one from his POV that describes what is happening to him as it actually happens.