There are various causes for an intra-occular bleed (one that happens within the eye). The vet will be able to examine it to determine what caused it. Some causes can be uncomfortable which would explain her restlessness and litterbox loafing.
It is possible to have a blood vessel on the surface of the eye bleed, which will cause a huge red blotch. I had one after my cataract surgery. These can be painless, though they look awful. If it is leaking a bit, that would explain the pink tinge in the tears.