What could I have? Possible pinworms..?

[Helpmelol]

Yesterday I was using the bathroom and went to flush the toilet and saw white stringy things clumped together separated from my normal, everyday poop. Sorry for the TMI. I do not believe I had anything resembling the cottony like things. I was terrified... I literally thought I was dying or something. I noticed this once before, but it was months ago and was only like one little thing. I haven't told my parents (I'm 16) about this, should I? Also I have had a cold, not sure if that is related to it. Plus a bit of abdominal pain but it's nothing more than if you feel gassy (which I have felt lately). The things were not moving. Today I went to the bathroom as soon as I felt something (sorry for the TMI) and checked and I saw some stringy things, only some mixed in with my poop and one thing almost the same looking thing as a very very white grain of rice (I have not consumed rice in weeks). I'm not sure if the appearance of them changed because I immediately went to the bathroom rather than holding it unlike the first time they appeared. Should I go to the doctor or just get over the cantor stuff? Also, can I get over the cantor things at 16 without permission from parents (obviously the medication to treat this). Thank you!