Runner's Training Tips: Shoulder/Neck Pain

I ran a ten miler with my jogging stroller.  I was a bit sore in the upper body the next day, but figured it was no big deal.  I took a rest day, then ran a 4.5 miler the day after.  I had to lock the front wheel because it was a weird terrain and I was getting some wicked vibrations that were making me feel unsafe.  When I did that, it made it really hard to turn the stroller.  I had to push really hard to turn the stroller.  I came home, took a nap with my son, and when I woke up, my shoulder (across from neck to shoulder, shoulder blade, and up the side of my neck and the middle of the neck to my skull, all on the right side) were killing me. 

I was getting sharp, acute pains at times.  A general achiness existed all of the time.  I also was really swollen, red and hot to the touch.  It started to get better to on and off achiness with no sharp pains, after much ice and six days rest.  So I tried a 1.5 mile really slow jog (no stroller).  I started hurting immediately after, so I returned to the ice and rest.  I gave it another six days where I iced and rested it.  It went to on and off achiness again to no pain for two consecutive days.

Today, I did a short run...ran a two miler at a 9:30 pace (pretty slow, but I was trying to keep a 10 min/mile pace).  After the first mile, I began getting shooting pains from my shoulder blade to my elbow.  After my run, while showering, I got a few that extended to my thumb.  I have been icing since I got out of the shower.

What the heck did I do???  What do I do now???  This is getting ready to cut into my half marathon training now (I would have liked to start Aug 3rd, but I will still be okay if I start the following week, I guess), so I am getting worried.  Should I take a day off tomorrow and try another slow short jog?  Should I rest until the 3rd and still attempt my long run?  I need some advice now and I'm getting sick of resting.  LoL!  I was really looking forward to a pain-free run today.