You remember good ole Newton? An object at rest tends to stay at rest, and an object in motion tends to stay in motion. That is how I feel about the gym. If I take some time off (except for travel), it is so much harder to get back to the gym! I hope you are able to get your gym mojo back this weekend:)
You will be so proud of yourself if you get the exercise in! Do it for your body and your sense of accomplishment. You'll be glad you did.