As already said; Time, time and more time. It took me almost 2 years to gain approx 1.5 inches as well. Now I’ve just today invested in a infrared lamp as heat isn’t something I’ve focused on at all and hope that will do the trick in me gaining another 0.5- 1 inch. Will use it doing manual exercises and try to incorporate it while extending as well. Maybe adding such a good heat source might do the trick as infrared lighting really goes deep in the tissue making your penis more pliable when doing your exercises.
If you haven’t tried extending for length I highly recommend it as it’s that which gave me the majority of my length gains. But you’ve gotta have enough hours in the day to reap the benefits of it and be patient. Its a pretty safe bet to gain some extra length as long as you’ve got time and stay persistent.
Also going to invest in a long pump where’s there’s not too much room for girth expansion leaving my penis only one route to go, as in upwards and longer.
Doing that after reading about the great length gains titleist has had by pumping alone, also I’ve gotten some length gains from using a BM already. I got like 0.25 inches in 2- 3 weeks from it which I’ve kept even after not using the pump that much as of lately. Also I love how long and thick my flaccid stays after pumping for a few weeks. Maybe you could try out pumping as well if you haven’t done that before as it might ‘shock’ your penis into a growth spur like it did for me.
Anyhow, wish you the best of luck and hope you’ll find some peace of mind and not obsess over this, I used to do so myself and it’s not a good state of mind to be in. It may even be detrimental for your gains as well as your body produces stress hormones which ain’t good at all for gaining.
Breathe deep and think positive thoughts about yourself and your penis. And lest not forget you’ve already gained quite a bit, actually you’ve gained more than the norm so do your best to be happy with that. I know it might be easier said than done but the sooner you start this process the sooner you’ll feel good about yourself and your quite remarkable achievement in PE. Very good job you’ve done thus far.