<human>: Can you give me the gist of the text in a nutshell?

Just got back from the vet with my 9 year old shepherd mix, and after a $228 bill we're still in the dark. 

I took her in for an exam, as she's been displaying a number of new behaviors that kind of have me paranoid. Excessive thirst and drinking, excessive urination, problems with her back legs, and she's lost ~15 lbs. The vet did a urine test, which came back clear (aside from being very diluted, and consisting of a few red blood cells). She then took a blood sample to have some bloodwork done, and they should call me tomorrow with the results. 

The vet told me that something is definitely going on, but she doesn't know what. Could be a kidney infection/disease, diabetes, possibly lyme disease? Not knowing what's going on is killing me, and tomorrow seems like an eternity to wait to hear back. I'm a nervous wreck right now, and I'm just not mentally ready for any major health issues with her.

I guess I'm just looking for some words of advice from fellow dog owners, specifically those who have dealt with the above health problems. Are these problems that can be worked through? She's only 9, and is super active and healthy, otherwise. But on the chance something major is going on, I just know I won't be able to afford super expensive medical bills. A few grand, yes. More than that? Not making $10/hour.
<bot>: Older dog may or may not have a kidney issue/diabetes/lyme disease/SOMETHING; won't know until tomorrow. Seeking advice on how to deal, or really anything help stop stressing the heck out. :(