I wish I could tell you that for sure it'll **all** go away once it's over, but of course I can't. The pregnancy hormones will certainly abate though at some point... about 25 weeks from now or less 
For me, pregnancy hormones tended to calm me down substantially, and it helped that being pregnant brought my lupus into remission too. The hormones after delivery were quite nice too in my case. Unfortunately you're experiencing quite the opposite of me!
I certainly understand the prednisone effects though. I definitely became much more aggressive on 20mg a day! Best wishes for smoother sailing for a while, and that the prednisone starts helping with the pain/inflammation.
For me, pregnancy hormones tended to calm me down substantially, and it helped that being pregnant brought my lupus into remission too. The hormones after delivery were quite nice too in my case. Unfortunately you're experiencing quite the opposite of me!
I certainly understand the prednisone effects though. I definitely became much more aggressive on 20mg a day! Best wishes for smoother sailing for a while, and that the prednisone starts helping with the pain/inflammation.