Exhausted by only day 4 of challenge :(

I am only on day 4 of the 10k steps a day challenge. I feel like I am getting to the point of exhaustion already. I can’t keep up with the housework so my surroundings are getting progressively worse. I don’t want to fail the challenge but I am needing a rest and to spend time cleaning up the mess that has built up since I have been focusing on completing the 10k steps per day. I just can’t keep up and that really frustrates me. I seem to get tired more easily than most people. That can be annoying because I am a competitive person in nature but I can’t keep up let alone win. I have to neglect areas of my life to even complete tasks.