At your age roughly 20% of people experience floaters and it increases about 10% per decade of life (example 50% by and 50). The tiny rapidly moving lights you see as walkietalkie says are almost always entopic phenomena they are blood cells in your retina. I can see them in my eye also. Sometimes called the blue field effect or "flying corpuscle". Do see an ophthalmoloigst yearly.
JCH MD
If you see an ophthalmologist on a regular basis and you don't have retinal problems there's not much to worry about.
Please reead the article "entoptic phenomenon" in wikipedia.
many posts here about people seeing stars, sparkles and tiny dots, etc.
they call it entopic phenomena. google it.