Since january 7th to 14th i had pressure/ headache along with little nausea , general physician did not find anomaly and prescribed a anti acid tablet. Eventually 2 weeks later headache subsided. After 14 th till today am having  following visual disturbances 1) when I close my eyes I see a tiny black spot sometimes and it do changes position. I had floaters but seeing a floater with closed eyes are highly unlikely. 2) when I sat inside car during 3-4 pm sun's rays were falling on other cars and a black small fleck gets created 3) one day after waking up when I blinked eye I could visualise the interior entopic phenomenon called as purkinjee tree. 4) when blinking hard keeping one eye closed in very dim lighting a black smudge in center can be seen 5) blinking hard keeping one eye closed cracks can be seen in peripheral. am just 21..am i developing some  degenerative disorders ? My eyes vision were completely fine month ago and i had retinal check up along with pressure, myopia etc