Thanks for writing to us.
As Dr.R.A.Singh has mentioned, your symptoms are suggestive of traumatic SCH(sub conjunctival hemorrhage ). It usually heals within a week or two without any medications.
A blunt trauma
should be examined under a microscope by the ophthalmologist to rule out internal bleed and inflammation ,which usually doesn't cause any significant visual disturbance in early stages.
An artificial tear with oral Vitamin C
supplements should be sufficient for a plain SCH.
So, take care and try avoiding further trauma in future.