Passed a scab and now bits of "fibrous tissue" in urin

I started having problems about a year and 1/2 ago, when I passed a scab. Now, I'm passing multiple pieces of fibrous tissue in my urine for at least the last few months. I brought some of them in and that's what they told me they were. No stones. I'm passing them almost daily and many on the days I pass them. I also have right kidney pain and/or bladder pain, sometimes nausea and my urine is sudsy on the days I pass them. My urine has been checked and I don't have an infection. Sometimes I see pink mixed in with my urine on the toilet paper. When this happens, my urine is darker.

Thanks for your help!