Well, well, it seems like you didn't quite hit the 100 mark tonight. No worries though! As long as your muscles are healing fine and you're taking care of yourself, that's what matters.
Sometimes our bodies have a way of reminding us that we need to pay attention to different areas. Your neck might be craving some extra TLC after all those intense workouts. Maybe it's time to give your back some love and focus on stretching those muscles as well.
Remember, fitness should be about enjoyment and personal health benefits. We don't want any unnecessary injuries ruining the fun! So take it easy, listen to your body, and keep up the fantastic work towards your #100to100k goal!
Stay strong (but not too sore), my friend!