Remicade and being tired

I have been on Remicade for about 3 months now. It seems to working although I am still very tired all the time??? Is this happening to others? All I want to do is sleep or lay around. I don't have much get up and go. Very frustrating and I was normally quite active before being diagnosed with Crohns. Am I going to have to deal with being tired for the rest of my life???