Need help managing new sides from Fin

A little bit about me and my journey on Fin. I'm 46 and I've been on fin now 20 months and I have started to see much better improvements in my hair recently then I have at any time during my 20 months. I take 1mg daily at night and have the entire time. I've been through a number of sheds and often considered stopping because I didn't think it was working.

In the beginning I had minor sides that went away after a few months of use. I have always been able to perform when it's time. Morning wood, daily erections and libido are a thing of the past. I have always just dealt with the other issues because getting an erection when intimate has not been a problem.

In the past few weeks/months, I've noticed that my whole groin and penis area is just dead and has very little feeling in it. My genitals and "member" have changed considerably in size and girth. (It's not in my head), I can see every time I go to the bathroom. I've tried to stay away from the fear monger sites, but I know something is causing this change. I plan to visit a urologist to have this looked at as well.

My question is.. I've taken the same dosage for 20 months. Would I do damage to the progress that I have made if I tried reducing the dosage to mitigate the sides? Can I stop taking for a few weeks to see if that subsides? If so, how long perform I lose the fin progress?

I really don't want to come off the drug but need to be sure it's the Fin that is causing the changes (think rubbery thin pencil).

Any thoughts would be greatly appreciated.