I have never had that reaction because I have never put off my shot from the day I'm supposed to do it.
I have read studies suggesting that taking synthetic testosterone can be psychologically (or maybe even physiologically) addictive. I don't know how long it takes for that to set it and at what dose, but that could be what you're experiencing.
I do want to caution you about a unilateral decision to not take your T as prescribed. Why on earth would you think it is a good idea to hold off taking your T shot just because you are sick and on antibiotics? Once you decide to take cross-hormone treatment, constant and stable delivery of T is *essential* for your physical and psychological well-being. This drug is potent, and it has significant peaks/troughs when you are injecting on a 14 day schedule (or even a shorter one). You are rolling the dice with your health if you think you can pick and choose when you should be injecting. There is no evidence that taking T compromises your immune system, nor is there any evidence that you'll have a better immune response to infections or viruses by delaying your T dosage. To the contrary, you are taking something that your body was *trying* to work out on a stable system and modifying that. If you are really worried about how sick you are and the effects of T, then you should speak with a doctor - whether it is the one who prescribed your T OR the one who prescribed your antibiotics.
Doing something out of the ordinary with your dosage or your timing only compromises the ability to follow-up on your medical care via meaningful bloodwork. It doesn't make it cheaper, easier or unnecessary.
And for someone who sure seemed eager to get on T to begin with and was worried about delaying your dose when you first got on it, I am utterly baffled by why you would do this.
