Tren and test for 4 months? Seems a tad excessive, doesn't it?
I've noticed as my arms have gotten bigger, that my hands/fingers sometimes go numb depending on how I'm holding them. For example, if I'm sitting or laying down and holding my phone a foot or so away from my face for ten minutes or more, the tingling happens. Once I straighten my elbows, it goes away instantly.
I assume it's more related to simple restricted bloodflow due to constricted blood vessels between my upper arms and forearms than a medical condition like carpal tunnel.
Regarding your insurance, I doubt they'll do a testosterone test unless you're absolutely jacked or you request it.