My bootie is numb!!

Yes, it is actually true... my butt is numb!  I noticed numbness in a spot on my butt last night but figured it was just temporary as I had been sitting in an awkward position.  I tried not to think about it too much as the night progressed.  When I woke up this morning to my surprise, it was still numb!!  An area about the size of two quarters on one of my cheeks!  I figured it had to do something with the lovely progesterone shots I had been receiving nightly.  Once again, I have been so lucky with the shots.  BD1 for some ODD reason loves giving shots so he gets really excited once 9pm rolls around.  And I will tell you the absolute truth - he is FANTASTIC at giving them!  They barely hurt when he stabs them in and three different nurses have seen my rear end and all commented that they have never seen a 'better butt' after 3 weeks of shots.  No lumps or bruises anywhere! I wasnt too concerned about the implications of a numb spot but placed a call into the nurse regardless.  She called back and reassured me that it was common for some to experience numbness and simply recommended that we avoid that particular spot for future shots.  She told me to continue rubbing the spot and using a heating pad after the shot, to which I exclaimed, "we have never done that! Should we be?"  She was astonished I have been lump/bruise free without using a heating pad at least!  Has anyone else gotten numb spots? Does the feeling eventually return?