In my case, I started T on the very same day that I started my period. Normally, my periods have always been about 5 to 7 days. But my last period was only three days long, and it was a lot lighter than they'd even been before. I haven't had a period since then, and it's been absolute bliss.
Don't be worried about still having one after four months.
I've been wandering around the net for some time, and some guys that I've read about have still had one after seven months. Unfortunately, not all of us stop at the same time. It may take longer for you to stop than others, but it should happen eventually, and if it doesn't, maybe you could have a talk with your doctor and ask him to raise the dosage that you take?