Is it possible that part of the splints splintered off while in my nose and left some pieces in my nose after being removed?

5 weeks ago I had septoplasty surgery. The doctor said everything is healing and looking great and that I had done a great job of cleaning out my nose. I've had the splints out for 3 weeks now. Today I started to feel like there was something sticking my tonsil. I tried coughing and it still felt like something was there. I started having a sneezing fit. I blew my nose and this weird mass (didn't look like a clot or scab) along with what looked like small plastic splinters came out. What is it??

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