Humira and muscle pain

I have been on Humira for about six months now. about a week ago I noticed the muscles in my legs were starting to hurt a little but contributed it to riding a bicycle for the first time since last fall. I took my Humira injection yesterday and now my leg muscles are hurting much worse, definitely not from the bike ride. On the Humira web site it mentions telling doctor right away if any of these signs of an infection exists, one of them being muscle ache. As far as I know I do not have an infection. No fever but I do get the chill quite often. My question is how serious is this? This is the start of a three day weekend so the very earliest I could talk to my doctor would be four days from now. Is this something I need to worry about?

Thanks for the response, It definitely makes walking not too much fun!