My back! I went walking with DH last night and after a few blocks my back was killing me already, if i sit to long when i get up my siatic is alll messed up..which never really gave me problems before.i guess its pregnancy..also my belly, sometimes it just feels heavy,sometimes there pressure if i move weird..i dont know but it seems like im alll full of aches and pains some days..it is amazing what we can do with our bodies, i never even gave it an second thought before getting pregnant now im amazed at the female body and what its capable of