Mounting frustration on top of pain.

Pretty frustrated with my insurance company right now. Yes, I pay alot of money to them every week out of my measly pay check. When I need a test done I expect it to go by without a freakin hitch!
I'll back up from my rant right now to give you alittle background info.

12 days ago I hurt my arm. I had been working out and then went bowling, then worked out again. Not all at the same time. I worked out on a Thursday, went bowling on a Friday (felt over the weekend I had over used my arm) then on Monday worked out again. Every day after my shoulder/upper arm started hurting worse and worse. On day 10 I decided it was time to visit the doctor. She had me put my arm out and pushed on it. She did this in many diff positions. I guess by my reaction (which was face wrinkled in pain) she decided it would be beneficial to do an MRI for a torn rotary cuff. I am really hoping this was not what it is but it is best to check. That way I make sure to let it heal properly and do the proper strengthening exercises.
They got the MRI scheduled for Wednesday afternoon at 430. Which was two days away. Now starts my rant!
Tuesday afternoon I get a call from the nurse at my doctors office who informs me that she had been trying to get a pre certification from my insurance company for my MRI. She said because my doctor wasn't in their system yet that it would take two days to get her in. My appointment was the next afternoon. My nurse assured me that she would call me back the next morning, the morning of my appointment, and let me know where it stands. She asked for it to be rushed due to my appointment and they refused to budge. So that brings us to today. My nurse calls and says, okay, they got us set up! I'm like YES!  My shoulder is starting to feel better but I need to know how to go about letting it heal. BUT she says, and I immediate feel my blood start to boil, Now that we are set up they give themselves a full 24 hours to approve precert's. So, that being said, my MRI has now been scheduled for Friday afternoon. Two more days of wait. All the while I feel my arm stiffening up. UGH! I'm so irritated.That means that I won't find out what the results are till Monday! How freakin ridiculous! For the freakin amount of money I pay them every week I expect better freakin service than this! I'm going to stop now because from this point on my though process is digressing.