Seeking advice on cats' health

Deat cats' parents,  

I  found some light yellow colored sesame-like particles around my little black cat's anus. She eats, poops and plays normal though. Are those yellow particle things worm eggs? Thanks.  I cannot type Chinese  characters on my current computer  so I communicate in  Englsih for this post.  I can read Chinese characters from my computer.

I am planning to take my cat to see a vet next week but thinking if I can obtain OTC drugs (I feel it is relatively easy to get rid of the worms in a cat) to reduce my cat's stress in seeing her vet. 

Thank you in advance for any suggestion! 

 

Su Mei