What are the effects of testosterone...

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I just had my first TRT shot yesterday, and my sleep cycle was *radically* different from previous ones.  Usually it's one big chunk of deep sleep right at the beginning followed by lots of long REM cycles; last night it was broken up into lots of short deep sleep and REM segments instead, with quite a few more micro-wakings than usual.

Anyone have any relevant info? Google hasn't been helpful; most of the articles talk about sleep apnea (which I don't have a problem with) or how REM is linked to testosterone *production*.  Not much on how TRT changes sleep patterns overall.

 

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Testosterone shots change sleep cycles?