i have.....for 6 months. just did it out of curiosity today. i never did it all that much to begin with.
I am not sure what your issues are. This entire post is riddled with contradictions. You say that you suffer from poor quality erections, yet you are capable of getting morning wood and having sex with your wife. So clearly, it is not a blood flow issue, because if it were, you wouldn't be able to achieve and sustain an erection long enough for intercourse.
You describe feeling depressed and anxious, which can certainly cause low libido and affect erection quality. I doubt that your problem is a mechanical one, or that your short-lived pumping routine half a year ago had anything to do with your erection quality today. The problem is most likely psychological, but if there is an underlying medical issue, such as diabetes, poor kidney function, etc, your blood work results will speak to that.
In the meantime, I wouldn't worry too much about shrinkage. A fuller flaccid throughout the day is nowhere near as important as being able to perform. It can surely be bothersome psychologically, but it is more important to know that it is functional, even if not on command. The point is, it still works, so you shouldn't lose all hope. I do not have any advice concerning the tenderness you are feeling on your shaft -- that is something you need to talk to your doctor about.
The only way to fix this is to make some lifestyle changes to deal with the anxiety and depression. Daily exercise can help with that, so make an effort to go to the gym every single day. Working out also raises your testosterone which increases libido, an added bonus. Next, drink plenty of water every day; it is extremely important to stay hydrated for both mind and body. Eat healthy (no processed foods whatsoever), and lose any extra weight if necessary. Make sure your BMI is within appropriate range.
Boron, magnesium glycinate, omega 3's, organ meats, and zinc all help to increase testosterone levels naturally. Look into them.
Finally, for rock hard erections, look into L-citrulline DL-malate, powdered form. Look into the overall benefits of increasing the production of nitric oxide, which is what L-citrulline DL-Malate does. Buy it, and give it 10 days to work. Don't ask me any questions. Just do it. You'll thank me later.