A day turned difficult

I have to say the day started off well.  I made it to the gym at 6am to an extra workout before breakfast.  The Monday assessment hike went well and I was able to keep up.... except for a tweek that I felt in my quad when running down a hill. It felt like a cramp so I ignored it and kept going, massaging it as I went.   Well, it continued to get worse as the day went on.  I am not sure if I pulled or tore something... it just hurts.  I am taking the night off and icing it.  It is really getting me down mentally though.  I have been dealing mentally with not losing weight (actually gaining) here but now with the thought of not being able to do everything, just stinks.  Just in a funk I guess.  I hope tomorrow is better.