Unfortunately, no one can tell you that except a blood T level test because the half-life (how long it stays in your system) of testosterone can vary vastly from guy to guy . I personally am not faring well with bi-weekly injections. I switched to every 12 days and even still during the last couple days I have pelvic cramps, my skin breaks out, and I get irritable and emotional. I'll probably be switching to weekly once my doctor okays it.
If you're not experiencing any 'trough' symptoms like I described, it's possible your T levels are still fairly level after missing a shot by a few days. It would take awhile for any changes you've already had to reverse, I would think, although the best rate of changes is usually achieved through keeping T levels at a consistent level. I was told by my doctor before beginning T that in her experience treating FTM's, if menstruation hasn't stopped within 5 months, it's usually because T levels are dropping too much between shots, thus not suppressing the ovaries enough. She said switching to weekly shots will often remedy that.
