Re: Rash in same spot that appears every couple months.
Shingle appears on one side of the body following a nerve path ( usually the back, neck, face, or one of the arms (only one side)).
I'll describe my experience so see if it helps you see any similarities.
I first noticed pain in my arm, almost like muscle soreness but it seemed to be pulsating (this is because the pain is actually from the nerves not the muscle). A few days later a patch of red appeared and then it spread a bit more (looking like a snake). The red area first itched but then burned and I couldn't touch it. A day later the outbreak started with little lumps. I went to the doctor got some awesome meds and waited for the outbreak to be done.
The pain is horrible, you feel this pulsating pain and its combined with the burn of the outbreaks. Finally the outbreaks burst, and then heal (very itchy process). It took me 3-4 weeks with lots of pain.
Your experience sounds like shingles, but I'm no doctor. The outbreaks of shingles are very unique, any doctor can diagnose you at this point. I'm surprised you don't describe more pain, since it's a big part of shingles. It's usually caused by stress or low immune system. Go to your doctor multiple shingle outbreaks at your age might indicate something else is wrong with your body resulting low immune system. Busy schedule does indicate a lot of stress, be careful. Lucky you if you have shingles and almost no pain, I couldn't even move my arm.