Here is a good video from Bodybuilding.com about how Week 3 is when 52% of people participating in a fitness challenge, workout challenge or workout program quit.
Transformation Inspiration: Don’t Fail In Week 3!
Hang in there, work through it and you can make it. Lean on friends & family for support. If you have to change the time of day that workout. Change up your routines order and make sure that you keep a log or journal of both your progress as well as your setbacks.