Pulled Arm Muscle

I woke up this morning & stretched... and I pulled my arm muscle.

I couldn't get up for five minutes while I rolled around in pain.
In fact, I couldn't really roll around.
I was in too much pain.

So I took half day off to recover... but my arm still hurt.
Twitched whenever I used the mouse.
I don't think it helped that it was cold in the office too.

I think my arms are cramped from using the laptop at a weird height.
Or it could be all the boxes I was packing at work.

I might have to exercise a bit.
Hafu.