Hello doctor and thanks for your effort here

At first i want to apologize for any english mistakes because iam form Germany
Last year in april i had a UTI with staphylococcus and entereccocus, the treating started late because 3 doctors didnt had a clue it was a UTI.
Also one urine sample was clean
The 4th visit to an urologist revealed the infection after 28 days.
It was treated with Azithromycin i think its called Z Pack also.
On the second day when i took azithromycin i noticed a tingling sensation in the flank i felt the same a few days earlier in my bladder.
Again i was at the urologist he did a kidney ultrasound and stated there is no infection.
A few days after this i lost a small kidney stone.
I went to an other urologist and he detected proteines in my urine (50mg dl)
I was reffered to a nephrologist who did a 24hr urine collection in the middle of september
I had 85mg UTP and 1300ml of urine.
They also did a first morning void sample which showed no protein.
They took another sample around 11 .am
No protein in it.
They told me to come back in April and of the first morning void is clean iam safe and dont need to visit them again.
Do you think i can trust them ?
I never had protein in my urine before that UTI and iam scared it left permanent kidney damage.
I had bad luck with doctors last year for other reasons which is a part of my fear of kidney disease.
Thank you very much....