Body is getting a little bit stronger

Friday and Saturday were really good days for me.  I always give myself a shot on Friday, but I went to the gym and worked out.  I felt really good until about 4 pm.  I got really tired and just felt like I had hit my wall.  I'm wondering if the shot had anything to do with it.  I must have over worked my upper arms because I felt like the bursitis was trying to start back in my shoulders.  I did sleep better Friday night.  Saturday I woke very sore in my arms and shoulders.  The first thing I do every single morning is jump in a hot shower to loosen my joints.  Got moving around and felt somewhat better. I went to the gym around 1 and had a really good workout.  I did the treadmill for 30 minutes and stairs for 3.  Worked on some other machines for lower body.  Felt really really good for the rest of the day until.... around 6 pm I started feeling super tired.  The Orencia gives me an upset stomach alittle after wards.  Sunday was just one of those days where I didn't move too well.  Not sure if doing too much at the gym affected me or what.  Lounged and did much of nothing.  Today is a new day and I'm starting all over...