Is my worry for nothing (urine bubbles among other things)

So, i am sorry if i sound a bit panicked, but I am afraid that thanks to Dr. Google, i have myself a bit worried now, and would appreciate some feedback.

Some general feedback: I am 34, 320lb (working on it, lost over 15lb so far), have sleep apnea (currently treated), and i suffer from severe health anxiety.. no point in lying about that.

Two months ago, for unrelated symptoms, i was seen by a cardiologist, and put on Lisinopril (20mg) for my blood pressure (I feel that i strongly have white coat syndrome, as my BP can be around 130/80 at home when i am relaxed). Because of this, i have also had several blood tests, which have included Kidney tests:

3-2-18:

Crea: .90 mg/dl

BUN: 10 mg/dl

Potassium: 3.6 mmol/L

3-7-18

Crea: .90 mg/dl

BUN: 9 mg/dl

Potassium: 3.7 mmol/L

4-4-18

Crea: .92 mg/dl

eGFR: 108 (i understand the estimate is likely too high based on weight?)

BUN: 8 mg/dl

Potassium: 4.4 mmol/L

Glucose: 115

I also had an abdominal UT the last month, where they didn't note anything about the kidneys other than appearing normal (they noted my liver looked fatty).

So, everything sounds great, and seems it.  I dont have any swelling anywhere either.

That said, why am i here?  Well, I am worried about the bubbles in my urine. I have noticed that even if i pee gently, i can still see some small bubbles form, and they can stay around. Dr. Google is kind enough to inform me that not only is this bad, but likely significant Kidney disease. Frankly, i would swear i have seen foam before, but admittedly, i haven't given it as much thought until now. I have also been having back pains, which get worse when stretching (problem is, i also have had back pains for most of my adult life.. i can feel my back popping in several places when i sneeze).

Otherwise, my function feels fairly regular. i go on average 2-3 hours (though, if i have an anxiety attack, it can make me go more often), don't wake up at night to pee (some mornings it looks more concentrated than other mornings.. the last few days have been lighter in the morning.

Sorry for rambling..  where i am now, is i am figuring i have bad CKD despite my bloodwork and UT. I haven't had a urine test (also being honest, i have a kit coming to me tomorrow), so i am even more vulnerable to believing the worst.

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