Ask an Eye Doctor and Get an Answer ASAP
It could be vitreous hemorrhage (bleeding). You should see an eye doctor to have an exam.
They may be just eye floaters (small flecks of a protein called collagen). They are usually benign. But if you flashes of light, a loss of side vision, or sudden increase of the number, it could be more serious such as retinal detachment, retinal tear, bleeding within the eye. If not, vitreous hemorrhage I mentioned to you is unlikely. However, they can rarely occur when there are eye disease, eye injury, diabetic retinopathy, crystal-like deposits, eye tumors. You should have your eye checked to exclude the possibilities.