Eye problem lines seen. Will i go blind?

I am taking anti epileptic drug for 11yrs and my last attack on 2009. And I am also suffering from floaters since 1.5yrs. My problem is that from 1 month when I woke up from sleeping and if I into the wall i found black lines for 1sec then vanishes. If I close the eye and open it after 1m or 2m, I found different image of lines (sometimes it looks like a crack on the glass, or sometime like a tree branches without leaves, sometimes only lines ). When I look into the sky I use to see many lines floats, i went to a retina specialists and he said my retina is ok and give me soft eye drop. But the black lines or image that I see while I get up from sleep does not float. It only seen for a fraction of second. Please know me why this happens. I am very nervous by seeing this. Will i go blind ?? Please help. Please advise me. Thanks.