Retinal detachment. Of a light bulb.

I am experiencing flickering of lights like that of a tube light and it makes me confused whether the light is flickering or is it my eyes ..I had visited an opthalmologist a week ago and he checked my retina through the opthalmoscope and  all other tests nd said that my eyes are healthy and occasionally I  see floaters as well so I was worried whether it could be retinal detachment or not and and I had visited the opthamologist a week ago but that time I did not experienced this flickering of light can it happen a week later ..when I visited the ophthalmologist last week this problem was not there and it happened 2 to 3 days after I visited that the doctor so could it be retinal detachment and I don't see flashes of light it is almost like flickering of a light bulb.. and floaters are only visible in a light background