A small amount of fecal matter has enough eggs and larvae of small and new worms and parasites in them.
I am talking about a q-tip amount on a slide and micro-scope but like most people. You probably don't have one in your back pocket. The one way to make me pass a lot of stool and loosely is eating whole pickled jalapenos with mayonnaise. Once you have some loose stool in the toilet it is easier to mix it around in the bowl with a bent metal hanger or long bamboo stick/skewer, helps with the fishing out of floating objects and anything that looks weird. Take a small glass jar and fill it with alcohol and some water. Take your little strange shapes and put them in the jar, cap then shake and leave for a while. Feces will darken the liquid and disolve but food and parasites will hold their shape and also firm up like being cooked a little bit so they don't fall apart so easy. Keep in mind everything you have eaten over the past few days to rule out normal stuff. Like Jalapenos have seeds.
You can then drain out the liquid and add fresh liquid and then take pictures. It is easier to take pictures of wet parasites in liquid than the ones that dry out and look like bits of food. Plus it is completely gross to see someone else's fecal matter and it really unsanitary to touch and contaminate everything you set feces on.
Remember you don't know what you are looking for, so don't rule out anything that is not feces. I found out I had the bacteria Borrelia burgdorferi, while treating myself for Flukes which is a completely strange shape and form. So be prepared to find anything, then once you have a certain class of infection you will be able to proceed safely on your own behalf using that as your focus. It is the same for any other person here. You must diagnose your infestation in order to benefit your own recovery.