Augh, I'm so sorry. I'd be steaming, too. It's crazy how much run around you've gotten from doctors.
I personally don't think that's no big deal but of course I'm not a doctor. Still, even if it wasn't a big deal, I think a doctor should point out that it was elevated and why it wasn't worthy of alarm. Which didn't happen.
I'd call the nurse tomorrow and ask about the labs. See what the doctor comes back with as an explanation.
First of all, I'm sorry you're feeling frustrated. I understand how you feel, it's difficult to get your lab results and feel like you didn't get everything explained to you.
You should obviously ask your dr if you want an explanation more tailored to your case, but I can tell you how I interpret this. Any number of things can cause elevated CRP levels. Most commonly infection and inflammation. But if you fall and get banged up, your CRP can rise from that, even if you're not injured. If you have an infection, your CRP usually goes up, often to 100-200, or even higher. An elevated CRP caused by inflammatory disease is also pretty high. A CRP of 7.8 is barely elevated. It is not clinically significant in 99% of cases. Obviously I'm not your doctor (just an almost-dr in my last semester of med school, so take this with a grain of salt), but a CRP of 7.8 is basically normal. If some underlying disease was causing your CRP to be high, it would be much higher.
That said, when I was dx'ed with Crohn's, my CRP wasn't very high at all. So I'm not saying you're fine, just explaining why I think your dr didn't even bring it up. It's above the upper limit but it is so unspecific and it's still very very low. Don't know if that helps, just figured I'd try.