Had a hysterectomy August 3 gaining weight not loosing weight really could use your help?

I had hysterectomy on August 3 gaining weight not loosing weight also before my surgery I was sleeping all night long now I go to bed at10 p.m. wake up at 12 a.m. and awake all night long. also my body been hot all night. I keep my air on all night long I'm on hormone replacement peramin 0.3 Any help would be greatly appreciated. Thanks Allot Jill