EYE FLOATERS. Of concern? is it normal?

1.I am experiencing eye floaters for last 15 days. It is like something dot like thing floating in middle of my right eye( 2 inches from eye). Specially, while reading books it is prevelant. Also when I spent time outside it was seen for sometimes. In room light, it is seen.It was like moving with direction of my right eye. But it wasn't seen when I am watching digital screen like laptop or mobile.I washed eyes with water several times , that didn't work. Should it be a matter of concern? 2.Also, I noticed very little yellow and grey part in white part of eye near to nose . It is seen when I move each eyes to out direction. It is in both eye. Is it normal? ( I wear glasses with (-1) in right and 0 in left. My age is 18 and I am fat. No chronic diseases diagnosed till now. No itchiness in eye.) P.S. - I am a student and attend online classes everyday from 9 to 5.30. I also have to read online study materials after that. I don't know if excess digital screen time causing it or not.