What if I stop using minoxidil and aminexil solution

In general genetic male pattern balding is not a condition which you can reverse or completely stop.  In general there are medical treatment options such as Propecia or Rogaine that can slow the process down.  You should follow up with your doctor.

It seems you have seen many doctors and have a treatment regimen.  There really isn't much more "out there" in terms of treatment.  The best course of action is to find a good doctor and stick with the treatment and follow up with the doctor if the treatment does not work....

If you have thinning hair you really need an evaluation to see if it is genetic or from another cause like stress or autoimmune. If it is determined to be genetic there are many options and traditional treatments like rogaine foam and propecia pills can be used. I have great success in my...

You can take any supplements you think may help.  Biotin is associated with hair health but it will likely not keep your hair from falling out if your hair loss is genetic.  

The very hormone that helps you produce breast milk (prolactin) may cause diffuse hair loss as many postpartum women complain of this phenomenon.  How this may affect a hair transplant surgery is not clear. I personally would not like to be the doctor who performs your surgery to have you...

Use common sense.  If you cut your hair "extremely" close as you state, you will naturally see your scalp.  If your hair grows "significantly since" you may still see your scalp "slightly".  If you have harsh lighting, you will see your scalp more than if you're in low lighting...