Do I have a yeast infection?

So my discharge doesn’t have any smells but on my underwear it looks a bit clumpy and a light yellow. My discharge has definitely changed from how it was before and it’s not as thick and stretchy as it usually was. It doesn’t itch or burn either.

I’m also 16 and afraid to ask my dad to take my to the gyno haha and I’m also not sexually active. Help?